data_PRDCC_000259 # _chem_comp.id PRD_000259 _chem_comp.name "N-acetyl-L-tryptophyl-L-alpha-glutamyl-N-[(1R)-2-carboxy-1-formylethyl]-3-(1H-imidazol-3-ium-4-yl)-L-alaninamide" _chem_comp.formula "C28 H36 N7 O9" _chem_comp.formula_weight 614.627 _chem_comp.pdbx_release_status REF_ONLY _chem_comp.type peptide-like _chem_comp.pdbx_type ? _chem_comp.mon_nstd_parent_comp_id ? _chem_comp.pdbx_synonyms ? _chem_comp.pdbx_formal_charge ? _chem_comp.pdbx_initial_date ? _chem_comp.pdbx_modified_date ? _chem_comp.pdbx_ambiguous_flag ? _chem_comp.pdbx_replaced_by ? _chem_comp.pdbx_replaces ? _chem_comp.one_letter_code ? _chem_comp.three_letter_code ? _chem_comp.pdbx_model_coordinates_details ? _chem_comp.pdbx_model_coordinates_missing_flag ? _chem_comp.pdbx_ideal_coordinates_details ? _chem_comp.pdbx_ideal_coordinates_missing_flag ? _chem_comp.pdbx_model_coordinates_db_code ? _chem_comp.pdbx_subcomponent_list ? _chem_comp.pdbx_processing_site ? # loop_ _chem_comp_atom.comp_id _chem_comp_atom.atom_id _chem_comp_atom.alt_atom_id _chem_comp_atom.type_symbol _chem_comp_atom.charge _chem_comp_atom.pdbx_align _chem_comp_atom.pdbx_aromatic_flag _chem_comp_atom.pdbx_leaving_atom_flag _chem_comp_atom.pdbx_stereo_config _chem_comp_atom.model_Cartn_x _chem_comp_atom.model_Cartn_y _chem_comp_atom.model_Cartn_z _chem_comp_atom.pdbx_model_Cartn_x_ideal _chem_comp_atom.pdbx_model_Cartn_y_ideal _chem_comp_atom.pdbx_model_Cartn_z_ideal _chem_comp_atom.pdbx_component_comp_id _chem_comp_atom.pdbx_residue_numbering _chem_comp_atom.pdbx_component_atom_id _chem_comp_atom.pdbx_polymer_type _chem_comp_atom.pdbx_ref_id _chem_comp_atom.pdbx_component_id _chem_comp_atom.pdbx_ordinal _chem_comp_atom.pdbx_backbone_atom_flag _chem_comp_atom.pdbx_n_terminal_atom_flag _chem_comp_atom.pdbx_c_terminal_atom_flag PRD_000259 C1 C1 C 0 1 N N N -33.267 35.900 -32.337 5.015 1.520 1.105 ACE 1 C polymer 1 1 1 ? ? ? PRD_000259 O1 O1 O 0 1 N N N -33.006 37.057 -32.109 4.398 0.965 1.988 ACE 1 O polymer 1 1 2 ? ? ? PRD_000259 C2 C2 C 0 1 N N N -32.009 35.107 -32.883 6.172 2.424 1.447 ACE 1 CH3 polymer 1 1 3 ? ? ? PRD_000259 N1 N1 N 0 1 N N N -34.040 35.019 -31.918 4.671 1.325 -0.184 TRP 2 N polymer 1 1 4 ? ? ? PRD_000259 C3 C3 C 0 1 N N S -35.283 34.535 -31.394 3.551 0.442 -0.517 TRP 2 CA polymer 1 1 5 ? ? ? PRD_000259 C4 C4 C 0 1 N N N -36.433 35.135 -32.295 2.290 0.967 0.121 TRP 2 C polymer 1 1 6 ? ? ? PRD_000259 O2 O2 O 0 1 N N N -36.687 36.326 -32.265 2.359 1.735 1.057 TRP 2 O polymer 1 1 7 ? ? ? PRD_000259 C5 C5 C 0 1 N N N -35.567 34.922 -29.918 3.839 -0.967 0.006 TRP 2 CB polymer 1 1 8 ? ? ? PRD_000259 C6 C6 C 0 1 Y N N -34.809 33.998 -29.001 5.028 -1.539 -0.722 TRP 2 CG polymer 1 1 9 ? ? ? PRD_000259 C7 C7 C 0 1 Y N N -35.177 32.722 -28.710 4.996 -2.332 -1.804 TRP 2 CD1 polymer 1 1 10 ? ? ? PRD_000259 C8 C8 C 0 1 Y N N -33.615 34.270 -28.232 6.439 -1.330 -0.386 TRP 2 CD2 polymer 1 1 11 ? ? ? PRD_000259 N2 N2 N 0 1 Y N N -34.303 32.187 -27.789 6.271 -2.653 -2.185 TRP 2 NE1 polymer 1 1 12 ? ? ? PRD_000259 C9 C9 C 0 1 Y N N -33.352 33.106 -27.480 7.177 -2.056 -1.338 TRP 2 CE2 polymer 1 1 13 ? ? ? PRD_000259 C10 C10 C 0 1 Y N N -32.734 35.354 -28.042 7.103 -0.612 0.611 TRP 2 CE3 polymer 1 1 14 ? ? ? PRD_000259 C11 C11 C 0 1 Y N N -32.285 32.999 -26.582 8.567 -2.048 -1.274 TRP 2 CZ2 polymer 1 1 15 ? ? ? PRD_000259 C12 C12 C 0 1 Y N N -31.681 35.242 -27.162 8.469 -0.618 0.655 TRP 2 CZ3 polymer 1 1 16 ? ? ? PRD_000259 C13 C13 C 0 1 Y N N -31.465 34.085 -26.432 9.202 -1.332 -0.283 TRP 2 CH2 polymer 1 1 17 ? ? ? PRD_000259 N3 N3 N 0 1 N N N -37.147 34.296 -33.093 1.087 0.582 -0.349 GLU 3 N polymer 1 1 18 ? ? ? PRD_000259 C14 C14 C 0 1 N N S -38.264 34.748 -33.965 -0.138 1.092 0.271 GLU 3 CA polymer 1 1 19 ? ? ? PRD_000259 C15 C15 C 0 1 N N N -39.530 34.079 -33.450 -1.265 0.120 0.032 GLU 3 C polymer 1 1 20 ? ? ? PRD_000259 O3 O3 O 0 1 N N N -39.535 33.594 -32.327 -1.064 -0.898 -0.595 GLU 3 O polymer 1 1 21 ? ? ? PRD_000259 C16 C16 C 0 1 N N N -38.023 34.303 -35.412 -0.495 2.447 -0.343 GLU 3 CB polymer 1 1 22 ? ? ? PRD_000259 C17 C17 C 0 1 N N N -36.560 34.320 -35.830 0.591 3.467 0.007 GLU 3 CG polymer 1 1 23 ? ? ? PRD_000259 C18 C18 C 0 1 N N N -36.353 33.819 -37.248 0.239 4.802 -0.598 GLU 3 CD polymer 1 1 24 ? ? ? PRD_000259 O4 O4 O 0 1 N N N -35.181 33.654 -37.659 -0.775 4.925 -1.242 GLU 3 OE1 polymer 1 1 25 ? ? ? PRD_000259 O5 O5 O 0 1 N N N -37.364 33.593 -37.950 1.053 5.855 -0.420 GLU 3 OE2 polymer 1 1 26 ? ? ? PRD_000259 N4 N4 N 0 1 N N N -40.592 34.032 -34.250 -2.495 0.383 0.515 HIS 4 N polymer 1 1 27 ? ? ? PRD_000259 C19 C19 C 0 1 N N S -41.814 33.376 -33.795 -3.590 -0.562 0.282 HIS 4 CA polymer 1 1 28 ? ? ? PRD_000259 C20 C20 C 0 1 N N N -42.586 32.654 -34.899 -4.907 0.169 0.343 HIS 4 C polymer 1 1 29 ? ? ? PRD_000259 O6 O6 O 0 1 N N N -42.408 32.935 -36.086 -4.928 1.362 0.560 HIS 4 O polymer 1 1 30 ? ? ? PRD_000259 C21 C21 C 0 1 N N N -42.735 34.378 -33.078 -3.561 -1.651 1.356 HIS 4 CB polymer 1 1 31 ? ? ? PRD_000259 C22 C22 C 0 1 Y N N -43.160 35.536 -33.928 -2.299 -2.462 1.215 HIS 4 CG polymer 1 1 32 ? ? ? PRD_000259 N5 N5 N 1 1 Y N N -42.316 36.579 -34.244 -1.155 -2.263 1.888 HIS 4 ND1 polymer 1 1 33 ? ? ? PRD_000259 C23 C23 C 0 1 Y N N -44.342 35.813 -34.528 -2.122 -3.517 0.397 HIS 4 CD2 polymer 1 1 34 ? ? ? PRD_000259 C24 C24 C 0 1 Y N N -42.960 37.450 -35.001 -0.275 -3.151 1.514 HIS 4 CE1 polymer 1 1 35 ? ? ? PRD_000259 N6 N6 N 0 1 Y N N -44.191 37.009 -35.189 -0.838 -3.953 0.584 HIS 4 NE2 polymer 1 1 36 ? ? ? PRD_000259 C25 C25 C 0 1 N N N -45.744 31.188 -35.225 -7.802 0.305 1.672 ASJ 5 C polymer 1 1 37 ? ? ? PRD_000259 N7 N7 N 0 1 N N N -43.436 31.713 -34.488 -6.060 -0.503 0.157 ASJ 5 N polymer 1 1 38 ? ? ? PRD_000259 O7 O7 O 0 1 N N N -46.298 31.796 -36.407 -8.073 -1.005 2.174 ASJ 5 O polymer 1 1 39 ? ? ? PRD_000259 C26 C26 C 0 1 N N S -44.254 30.925 -35.409 -7.340 0.208 0.217 ASJ 5 CA polymer 1 1 40 ? ? ? PRD_000259 C27 C27 C 0 1 N N N -44.018 29.424 -35.204 -8.385 -0.554 -0.600 ASJ 5 CB polymer 1 1 41 ? ? ? PRD_000259 C28 C28 C 0 1 N N N -42.582 29.009 -35.463 -7.991 -0.543 -2.055 ASJ 5 CG polymer 1 1 42 ? ? ? PRD_000259 O8 O8 O 0 1 N N N -42.058 28.177 -34.696 -8.765 -1.155 -2.965 ASJ 5 OD1 polymer 1 1 43 ? ? ? PRD_000259 O9 O9 O 0 1 N N N -41.978 29.507 -36.434 -6.977 0.016 -2.402 ASJ 5 OD2 polymer 1 1 44 ? ? ? PRD_000259 H1 H1 H 0 1 N N N -31.145 35.785 -32.942 7.092 1.842 1.475 ACE 1 H1 polymer 1 1 45 ? ? ? PRD_000259 H2 H2 H 0 1 N N N -31.776 34.275 -32.202 6.258 3.205 0.692 ACE 1 H2 polymer 1 1 46 ? ? ? PRD_000259 H3 H3 H 0 1 N N N -32.232 34.710 -33.884 6.000 2.880 2.422 ACE 1 H3 polymer 1 1 47 ? ? ? PRD_000259 H4 H4 H 0 1 N N N -33.487 34.188 -31.983 5.165 1.770 -0.891 TRP 2 H polymer 1 1 48 ? ? ? PRD_000259 H5 H5 H 0 1 N N N -35.323 33.439 -31.478 3.424 0.409 -1.599 TRP 2 HA polymer 1 1 49 ? ? ? PRD_000259 H6 H6 H 0 1 N N N -35.244 35.959 -29.742 4.054 -0.921 1.073 TRP 2 HB2 polymer 1 1 50 ? ? ? PRD_000259 H7 H7 H 0 1 N N N -36.645 34.835 -29.717 2.970 -1.602 -0.163 TRP 2 HB3 polymer 1 1 51 ? ? ? PRD_000259 H8 H8 H 0 1 N N N -36.025 32.206 -29.136 4.098 -2.668 -2.300 TRP 2 HD1 polymer 1 1 52 ? ? ? PRD_000259 H9 H9 H 0 1 N N N -34.360 31.265 -27.407 6.501 -3.215 -2.941 TRP 2 HE1 polymer 1 1 53 ? ? ? PRD_000259 H10 H10 H 0 1 N N N -32.885 36.274 -28.588 6.539 -0.053 1.343 TRP 2 HE3 polymer 1 1 54 ? ? ? PRD_000259 H11 H11 H 0 1 N N N -32.114 32.090 -26.025 9.146 -2.601 -1.998 TRP 2 HZ2 polymer 1 1 55 ? ? ? PRD_000259 H12 H12 H 0 1 N N N -31.007 36.077 -27.038 8.982 -0.062 1.426 TRP 2 HZ3 polymer 1 1 56 ? ? ? PRD_000259 H13 H13 H 0 1 N N N -30.640 34.039 -25.736 10.281 -1.327 -0.235 TRP 2 HH2 polymer 1 1 57 ? ? ? PRD_000259 H14 H14 H 0 1 N N N -36.908 33.325 -33.093 1.032 -0.032 -1.098 GLU 3 H polymer 1 1 58 ? ? ? PRD_000259 H15 H15 H 0 1 N N N -38.370 35.842 -33.922 0.019 1.209 1.344 GLU 3 HA polymer 1 1 59 ? ? ? PRD_000259 H16 H16 H 0 1 N N N -38.403 33.277 -35.526 -0.565 2.349 -1.426 GLU 3 HB2 polymer 1 1 60 ? ? ? PRD_000259 H17 H17 H 0 1 N N N -38.581 34.977 -36.079 -1.452 2.785 0.054 GLU 3 HB3 polymer 1 1 61 ? ? ? PRD_000259 H18 H18 H 0 1 N N N -36.186 35.352 -35.763 0.660 3.566 1.090 GLU 3 HG2 polymer 1 1 62 ? ? ? PRD_000259 H19 H19 H 0 1 N N N -35.990 33.678 -35.143 1.548 3.129 -0.389 GLU 3 HG3 polymer 1 1 63 ? ? ? PRD_000259 H20 H20 H 0 1 N N N -37.093 33.289 -38.808 0.786 6.690 -0.827 GLU 3 HE2 polymer 1 1 64 ? ? ? PRD_000259 H21 H21 H 0 1 N N N -40.553 34.445 -35.160 -2.656 1.197 1.016 HIS 4 H polymer 1 1 65 ? ? ? PRD_000259 H22 H22 H 0 1 N N N -41.530 32.616 -33.052 -3.474 -1.018 -0.701 HIS 4 HA polymer 1 1 66 ? ? ? PRD_000259 H23 H23 H 0 1 N N N -43.637 33.842 -32.748 -3.589 -1.189 2.343 HIS 4 HB2 polymer 1 1 67 ? ? ? PRD_000259 H24 H24 H 0 1 N N N -42.201 34.771 -32.201 -4.427 -2.303 1.236 HIS 4 HB3 polymer 1 1 68 ? ? ? PRD_000259 H25 H25 H 0 1 N N N -41.365 36.663 -33.947 -1.006 -1.568 2.548 HIS 4 HD1 polymer 1 1 69 ? ? ? PRD_000259 H26 H26 H 0 1 N N N -45.236 35.208 -34.494 -2.853 -3.938 -0.277 HIS 4 HD2 polymer 1 1 70 ? ? ? PRD_000259 H27 H27 H 0 1 N N N -42.550 38.367 -35.398 0.735 -3.232 1.887 HIS 4 HE1 polymer 1 1 71 ? ? ? PRD_000259 H28 H28 H 0 1 N N N -44.898 37.470 -35.725 -0.413 -4.700 0.135 HIS 4 HE2 polymer 1 1 72 ? ? ? PRD_000259 H29 H29 H 0 1 N N N -45.890 31.863 -34.369 -8.707 0.910 1.727 ASJ 5 H3 polymer 1 1 73 ? ? ? PRD_000259 H30 H30 H 0 1 N Y N -46.259 30.235 -35.033 -7.018 0.768 2.272 ASJ 5 HAA polymer 1 1 74 ? ? ? PRD_000259 H31 H31 H 0 1 N N N -43.518 31.538 -33.507 -6.043 -1.457 -0.016 ASJ 5 H polymer 1 1 75 ? ? ? PRD_000259 H32 H32 H 0 1 N N N -47.226 31.954 -36.277 -8.372 -1.020 3.094 ASJ 5 HO polymer 1 1 76 ? ? ? PRD_000259 H33 H33 H 0 1 N N N -43.981 31.179 -36.444 -7.218 1.211 -0.193 ASJ 5 HA polymer 1 1 77 ? ? ? PRD_000259 H34 H34 H 0 1 N N N -44.275 29.167 -34.166 -8.443 -1.583 -0.247 ASJ 5 HB polymer 1 1 78 ? ? ? PRD_000259 H35 H35 H 0 1 N N N -44.673 28.869 -35.892 -9.357 -0.075 -0.484 ASJ 5 HBA polymer 1 1 79 ? ? ? PRD_000259 H36 H36 H 0 0 N N N -41.166 28.006 -34.975 -8.471 -1.122 -3.885 ASJ 5 HOD1 polymer 1 1 80 ? ? ? # loop_ _chem_comp_bond.comp_id _chem_comp_bond.atom_id_1 _chem_comp_bond.atom_id_2 _chem_comp_bond.value_order _chem_comp_bond.pdbx_aromatic_flag _chem_comp_bond.pdbx_stereo_config _chem_comp_bond.pdbx_ordinal PRD_000259 C1 O1 DOUB N N 1 PRD_000259 C1 C2 SING N N 2 PRD_000259 C2 H1 SING N N 3 PRD_000259 C2 H2 SING N N 4 PRD_000259 C2 H3 SING N N 5 PRD_000259 N1 C3 SING N N 6 PRD_000259 N1 H4 SING N N 7 PRD_000259 C3 C4 SING N N 8 PRD_000259 C3 C5 SING N N 9 PRD_000259 C3 H5 SING N N 10 PRD_000259 C4 O2 DOUB N N 11 PRD_000259 C5 C6 SING N N 12 PRD_000259 C5 H6 SING N N 13 PRD_000259 C5 H7 SING N N 14 PRD_000259 C6 C7 DOUB Y N 15 PRD_000259 C6 C8 SING Y N 16 PRD_000259 C7 N2 SING Y N 17 PRD_000259 C7 H8 SING N N 18 PRD_000259 C8 C9 DOUB Y N 19 PRD_000259 C8 C10 SING Y N 20 PRD_000259 N2 C9 SING Y N 21 PRD_000259 N2 H9 SING N N 22 PRD_000259 C9 C11 SING Y N 23 PRD_000259 C10 C12 DOUB Y N 24 PRD_000259 C10 H10 SING N N 25 PRD_000259 C11 C13 DOUB Y N 26 PRD_000259 C11 H11 SING N N 27 PRD_000259 C12 C13 SING Y N 28 PRD_000259 C12 H12 SING N N 29 PRD_000259 C13 H13 SING N N 30 PRD_000259 N3 C14 SING N N 31 PRD_000259 N3 H14 SING N N 32 PRD_000259 C14 C15 SING N N 33 PRD_000259 C14 C16 SING N N 34 PRD_000259 C14 H15 SING N N 35 PRD_000259 C15 O3 DOUB N N 36 PRD_000259 C16 C17 SING N N 37 PRD_000259 C16 H16 SING N N 38 PRD_000259 C16 H17 SING N N 39 PRD_000259 C17 C18 SING N N 40 PRD_000259 C17 H18 SING N N 41 PRD_000259 C17 H19 SING N N 42 PRD_000259 C18 O4 DOUB N N 43 PRD_000259 C18 O5 SING N N 44 PRD_000259 O5 H20 SING N N 45 PRD_000259 N4 C19 SING N N 46 PRD_000259 N4 H21 SING N N 47 PRD_000259 C19 C20 SING N N 48 PRD_000259 C19 C21 SING N N 49 PRD_000259 C19 H22 SING N N 50 PRD_000259 C20 O6 DOUB N N 51 PRD_000259 C21 C22 SING N N 52 PRD_000259 C21 H23 SING N N 53 PRD_000259 C21 H24 SING N N 54 PRD_000259 C22 N5 SING Y N 55 PRD_000259 C22 C23 DOUB Y N 56 PRD_000259 N5 C24 DOUB Y N 57 PRD_000259 N5 H25 SING N N 58 PRD_000259 C23 N6 SING Y N 59 PRD_000259 C23 H26 SING N N 60 PRD_000259 C24 N6 SING Y N 61 PRD_000259 C24 H27 SING N N 62 PRD_000259 N6 H28 SING N N 63 PRD_000259 C25 O7 SING N N 64 PRD_000259 C25 C26 SING N N 65 PRD_000259 C25 H29 SING N N 66 PRD_000259 C25 H30 SING N N 67 PRD_000259 C26 N7 SING N N 68 PRD_000259 N7 H31 SING N N 69 PRD_000259 O7 H32 SING N N 70 PRD_000259 C27 C26 SING N N 71 PRD_000259 C26 H33 SING N N 72 PRD_000259 C27 C28 SING N N 73 PRD_000259 C27 H34 SING N N 74 PRD_000259 C27 H35 SING N N 75 PRD_000259 C28 O9 DOUB N N 76 PRD_000259 C28 O8 SING N N 77 PRD_000259 O8 H36 SING N N 78 PRD_000259 C1 N1 SING N N 79 PRD_000259 C20 N7 SING N N 80 PRD_000259 C4 N3 SING N N 81 PRD_000259 C15 N4 SING N N 82 # loop_ _pdbx_chem_comp_descriptor.comp_id _pdbx_chem_comp_descriptor.type _pdbx_chem_comp_descriptor.program _pdbx_chem_comp_descriptor.program_version _pdbx_chem_comp_descriptor.descriptor PRD_000259 SMILES ACDLabs 12.01 "O=C(O)CC(NC(=O)C(NC(=O)C(NC(=O)C(NC(=O)C)Cc2c1ccccc1nc2)CCC(=O)O)Cc3cnc[nH+]3)CO" PRD_000259 InChI InChI 1.03 "InChI=1S/C28H35N7O9/c1-15(37)32-22(8-16-11-30-20-5-3-2-4-19(16)20)28(44)34-21(6-7-24(38)39)26(42)35-23(9-17-12-29-14-31-17)27(43)33-18(13-36)10-25(40)41/h2-5,11-12,14,18,21-23,30,36H,6-10,13H2,1H3,(H,29,31)(H,32,37)(H,33,43)(H,34,44)(H,35,42)(H,38,39)(H,40,41)/p+1" PRD_000259 InChIKey InChI 1.03 MMWLSMCDYWODRU-UHFFFAOYSA-O PRD_000259 SMILES_CANONICAL CACTVS 3.370 "CC(=O)N[C@@H](Cc1c[nH]c2ccccc12)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](Cc3c[nH]c[nH+]3)C(=O)N[C@H](CO)CC(O)=O" PRD_000259 SMILES CACTVS 3.370 "CC(=O)N[CH](Cc1c[nH]c2ccccc12)C(=O)N[CH](CCC(O)=O)C(=O)N[CH](Cc3c[nH]c[nH+]3)C(=O)N[CH](CO)CC(O)=O" PRD_000259 SMILES_CANONICAL "OpenEye OEToolkits" 1.7.6 "CC(=O)N[C@@H](Cc1c[nH]c2c1cccc2)C(=O)N[C@@H](CCC(=O)O)C(=O)N[C@@H](Cc3c[nH]c[nH+]3)C(=O)N[C@@H](CC(=O)O)CO" PRD_000259 SMILES "OpenEye OEToolkits" 1.7.6 "CC(=O)NC(Cc1c[nH]c2c1cccc2)C(=O)NC(CCC(=O)O)C(=O)NC(Cc3c[nH]c[nH+]3)C(=O)NC(CC(=O)O)CO" # loop_ _pdbx_chem_comp_identifier.comp_id _pdbx_chem_comp_identifier.type _pdbx_chem_comp_identifier.program _pdbx_chem_comp_identifier.program_version _pdbx_chem_comp_identifier.identifier PRD_000259 "SYSTEMATIC NAME" ACDLabs 12.01 "N-acetyl-L-tryptophyl-L-alpha-glutamyl-N-[(2R)-1-carboxy-3-hydroxypropan-2-yl]-3-(1H-imidazol-3-ium-4-yl)-L-alaninamide" PRD_000259 "SYSTEMATIC NAME" "OpenEye OEToolkits" 1.7.6 "(4S)-4-[[(2S)-2-acetamido-3-(1H-indol-3-yl)propanoyl]amino]-5-[[(2S)-1-[[(2S)-1,4-bis(oxidanyl)-4-oxidanylidene-butan-2-yl]amino]-3-(1H-imidazol-3-ium-4-yl)-1-oxidanylidene-propan-2-yl]amino]-5-oxidanylidene-pentanoic acid" #