data_A1A3A # _chem_comp.id A1A3A _chem_comp.name "1,1'-[(2E)-but-2-ene-1,4-diyl]bis{2-[(1-ethyl-3-methyl-1H-pyrazole-5-carbonyl)amino]-7-methoxy-1H-1,3-benzimidazole-5-carboxamide}" _chem_comp.type non-polymer _chem_comp.pdbx_type HETAIN _chem_comp.formula "C36 H40 N12 O6" _chem_comp.mon_nstd_parent_comp_id ? _chem_comp.pdbx_synonyms ? _chem_comp.pdbx_formal_charge 0 _chem_comp.pdbx_initial_date 2024-08-23 _chem_comp.pdbx_modified_date 2025-06-13 _chem_comp.pdbx_ambiguous_flag N _chem_comp.pdbx_release_status REL _chem_comp.pdbx_replaced_by ? _chem_comp.pdbx_replaces ? _chem_comp.formula_weight 736.780 _chem_comp.one_letter_code ? _chem_comp.three_letter_code A1A3A _chem_comp.pdbx_model_coordinates_details ? _chem_comp.pdbx_model_coordinates_missing_flag N _chem_comp.pdbx_ideal_coordinates_details Corina _chem_comp.pdbx_ideal_coordinates_missing_flag N _chem_comp.pdbx_model_coordinates_db_code 9CUB _chem_comp.pdbx_subcomponent_list ? _chem_comp.pdbx_processing_site RCSB _chem_comp.pdbx_pcm ? # 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.pdbx_n_terminal_atom_flag _chem_comp_atom.pdbx_backbone_atom_flag _chem_comp_atom.pdbx_c_terminal_atom_flag _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_atom_id _chem_comp_atom.pdbx_component_comp_id _chem_comp_atom.pdbx_ordinal A1A3A N1 N1 N 0 1 Y N N N N N 3.645 3.139 25.560 4.078 -0.791 1.253 N1 A1A3A 1 A1A3A N3 N2 N 0 1 Y N N N N N 4.556 -1.665 21.342 7.828 3.568 -1.490 N3 A1A3A 2 A1A3A C4 C1 C 0 1 Y N N N N N 1.548 9.134 19.388 -0.905 -2.803 -2.841 C4 A1A3A 3 A1A3A C5 C2 C 0 1 Y N N N N N 3.090 -1.572 23.052 5.771 3.705 -0.760 C5 A1A3A 4 A1A3A C6 C3 C 0 1 Y N N N N N 3.292 0.256 17.013 -5.685 3.866 0.576 C6 A1A3A 5 A1A3A C7 C4 C 0 1 Y N N N N N 3.746 6.458 27.257 1.958 -3.505 2.692 C7 A1A3A 6 A1A3A C8 C5 C 0 1 Y N N N N N 2.066 9.189 18.097 -2.096 -3.530 -2.719 C8 A1A3A 7 A1A3A C10 C6 C 0 1 Y N N N N N 2.208 6.799 18.071 -3.199 -1.579 -1.834 C10 A1A3A 8 A1A3A N12 N3 N 0 1 N N N N N N 2.100 3.329 18.610 -4.248 1.559 -0.642 N12 A1A3A 9 A1A3A C13 C7 C 0 1 Y N N N N N 4.402 6.561 24.937 0.781 -1.424 2.382 C13 A1A3A 10 A1A3A C15 C8 C 0 1 Y N N N N N 3.777 -0.389 23.031 6.269 2.442 -0.493 C15 A1A3A 11 A1A3A C17 C9 C 0 1 Y N N N N N 3.601 -2.328 21.986 6.810 4.385 -1.399 C17 A1A3A 12 A1A3A C20 C10 C 0 1 Y N N N N N 2.023 4.641 18.578 -3.589 0.453 -1.148 C20 A1A3A 13 A1A3A C21 C11 C 0 1 N N N N N N 3.552 4.946 21.600 0.660 1.541 -0.043 C21 A1A3A 14 A1A3A C22 C12 C 0 1 N N N N N N 2.314 4.480 21.777 -0.648 1.557 -0.113 C22 A1A3A 15 A1A3A C24 C13 C 0 1 N N N N N N 2.265 10.525 17.442 -2.136 -4.950 -3.124 C24 A1A3A 16 A1A3A C26 C14 C 0 1 N N N N N N 2.585 2.660 17.544 -5.552 1.474 -0.313 C26 A1A3A 17 A1A3A C28 C15 C 0 1 N N N N N N 3.299 -2.357 17.035 -6.615 6.019 1.669 C28 A1A3A 18 A1A3A C1 C16 C 0 1 Y N N N N N 3.520 5.090 27.144 3.124 -2.938 2.187 C1 A1A3A 19 A1A3A C2 C17 C 0 1 Y N N N N N 2.435 8.018 17.444 -3.240 -2.920 -2.216 C2 A1A3A 20 A1A3A C3 C18 C 0 1 Y N N N N N 4.194 7.189 26.159 0.787 -2.742 2.788 C3 A1A3A 21 A1A3A C9 C19 C 0 1 Y N N N N N 3.775 4.468 25.929 3.123 -1.605 1.775 C9 A1A3A 22 A1A3A C11 C20 C 0 1 Y N N N N N 4.212 5.181 24.835 1.944 -0.847 1.874 C11 A1A3A 23 A1A3A C12 C21 C 0 1 Y N N N N N 1.660 6.731 19.331 -2.002 -0.855 -1.966 C12 A1A3A 24 A1A3A C14 C22 C 0 1 Y N N N N N 1.352 7.911 20.009 -0.859 -1.476 -2.465 C14 A1A3A 25 A1A3A C16 C23 C 0 1 Y N N N N N 2.525 1.181 17.668 -6.224 2.614 0.330 C16 A1A3A 26 A1A3A C18 C24 C 0 1 Y N N N N N 2.814 -0.997 17.428 -6.703 4.590 1.199 C18 A1A3A 27 A1A3A C19 C25 C 0 1 Y N N N N N 4.001 3.012 24.260 3.570 0.394 1.030 C19 A1A3A 28 A1A3A C23 C26 C 0 1 N N N N N N 3.518 7.147 28.570 1.955 -4.916 3.128 C23 A1A3A 29 A1A3A C25 C27 C 0 1 N N N N N N 3.654 0.748 23.979 5.563 1.337 0.174 C25 A1A3A 30 A1A3A C27 C28 C 0 1 N N N N N N 3.196 -3.696 21.537 6.767 5.807 -1.895 C27 A1A3A 31 A1A3A C29 C29 C 0 1 N N N N N N 5.089 1.384 20.444 9.175 1.278 0.449 C29 A1A3A 32 A1A3A C30 C30 C 0 1 N N N N N N 0.911 0.771 20.756 -8.398 0.760 2.077 C30 A1A3A 33 A1A3A C31 C31 C 0 1 N N N N N N 4.737 8.591 23.685 -1.512 -1.343 3.005 C31 A1A3A 34 A1A3A C32 C32 C 0 1 N N N N N N 1.291 8.587 22.303 1.433 -1.477 -3.099 C32 A1A3A 35 A1A3A C33 C33 C 0 1 N N N N N N 4.748 4.599 22.426 1.343 1.555 1.300 C33 A1A3A 36 A1A3A C34 C34 C 0 1 N N N N N N 1.125 4.840 20.939 -1.331 1.543 -1.456 C34 A1A3A 37 A1A3A C35 C35 C 0 1 N N N N N N 5.654 0.490 21.517 8.462 1.283 -0.905 C35 A1A3A 38 A1A3A C36 C36 C 0 1 N N N N N N 0.555 0.943 19.300 -8.453 1.535 0.758 C36 A1A3A 39 A1A3A N2 N4 N 0 1 Y N N N N N 2.410 5.509 17.615 -4.129 -0.725 -1.330 N2 A1A3A 40 A1A3A N4 N5 N 0 1 Y N N N N N 1.800 -0.866 18.280 -7.747 3.809 1.303 N4 A1A3A 41 A1A3A N5 N6 N 0 1 Y N N N N N 4.376 4.260 23.798 2.255 0.412 1.396 N5 A1A3A 42 A1A3A N6 N7 N 0 1 Y N N N N N 1.530 5.374 19.638 -2.274 0.423 -1.513 N6 A1A3A 43 A1A3A N7 N8 N 0 1 Y N N N N N 4.668 -0.475 22.007 7.549 2.427 -0.972 N7 A1A3A 44 A1A3A N8 N9 N 0 1 Y N N N N N 1.625 0.483 18.412 -7.504 2.649 0.806 N8 A1A3A 45 A1A3A N9 N10 N 0 1 N N N N N N 4.097 6.632 29.649 0.827 -5.468 3.618 N9 A1A3A 46 A1A3A N10 N11 N 0 1 N N N N N N 1.974 10.635 16.149 -1.029 -5.544 -3.611 N10 A1A3A 47 A1A3A N11 N12 N 0 1 N N N N N N 4.007 1.951 23.481 4.263 1.469 0.501 N11 A1A3A 48 A1A3A O1 O1 O 0 1 N N N N N N 2.822 8.174 28.610 2.970 -5.580 3.045 O1 A1A3A 49 A1A3A O2 O2 O 0 1 N N N N N N 2.664 11.485 18.121 -3.169 -5.583 -3.018 O2 A1A3A 50 A1A3A O3 O3 O 0 1 N N N N N N 3.287 0.524 25.132 6.153 0.304 0.429 O3 A1A3A 51 A1A3A O4 O4 O 0 1 N N N N N N 3.001 3.170 16.499 -6.174 0.456 -0.549 O4 A1A3A 52 A1A3A O5 O5 O 0 1 N N N N N N 4.874 7.171 23.803 -0.358 -0.688 2.476 O5 A1A3A 53 A1A3A O6 O6 O 0 1 N N N N N N 0.806 7.752 21.253 0.301 -0.776 -2.580 O6 A1A3A 54 A1A3A H4 H2 H 0 1 N N N N N N 1.298 10.047 19.907 -0.018 -3.284 -3.228 H4 A1A3A 55 A1A3A H5 H3 H 0 1 N N N N N N 2.315 -1.864 23.745 4.788 4.084 -0.525 H5 A1A3A 56 A1A3A H6 H4 H 0 1 N N N N N N 4.098 0.450 16.321 -4.688 4.207 0.339 H6 A1A3A 57 A1A3A H39 H5 H 0 1 N N N N N N 1.800 2.829 19.422 -3.771 2.395 -0.523 H39 A1A3A 58 A1A3A H7 H6 H 0 1 N N N N N N 3.703 5.638 20.785 1.249 1.517 -0.948 H7 A1A3A 59 A1A3A H8 H7 H 0 1 N N N N N N 2.156 3.787 22.590 -1.237 1.581 0.792 H8 A1A3A 60 A1A3A H12 H8 H 0 1 N N N N N N 2.699 -3.123 17.548 -6.926 6.686 0.865 H12 A1A3A 61 A1A3A H13 H9 H 0 1 N N N N N N 3.199 -2.482 15.947 -7.268 6.160 2.531 H13 A1A3A 62 A1A3A H14 H10 H 0 1 N N N N N N 4.356 -2.466 17.321 -5.587 6.246 1.952 H14 A1A3A 63 A1A3A H1 H11 H 0 1 N N N N N N 3.153 4.522 27.986 4.026 -3.527 2.114 H1 A1A3A 64 A1A3A H2 H12 H 0 1 N N N N N N 2.891 8.055 16.466 -4.158 -3.482 -2.122 H2 A1A3A 65 A1A3A H3 H13 H 0 1 N N N N N N 4.380 8.248 26.258 -0.115 -3.188 3.181 H3 A1A3A 66 A1A3A H11 H14 H 0 1 N N N N N N 3.796 -3.988 20.662 6.411 5.822 -2.925 H11 A1A3A 67 A1A3A H10 H15 H 0 1 N N N N N N 3.364 -4.414 22.353 6.091 6.390 -1.269 H10 A1A3A 68 A1A3A H9 H16 H 0 1 N N N N N N 2.130 -3.692 21.266 7.767 6.239 -1.850 H9 A1A3A 69 A1A3A H17 H17 H 0 1 N N N N N N 5.863 2.089 20.108 9.741 2.202 0.565 H17 A1A3A 70 A1A3A H15 H18 H 0 1 N N N N N N 4.758 0.771 19.593 8.437 1.201 1.247 H15 A1A3A 71 A1A3A H16 H19 H 0 1 N N N N N N 4.233 1.944 20.847 9.854 0.427 0.498 H16 A1A3A 72 A1A3A H19 H20 H 0 1 N N N N N N 0.080 1.129 21.382 -9.105 -0.069 2.041 H19 A1A3A 73 A1A3A H18 H21 H 0 1 N N N N N N 1.095 -0.293 20.965 -7.391 0.373 2.229 H18 A1A3A 74 A1A3A H20 H22 H 0 1 N N N N N N 1.817 1.352 20.983 -8.660 1.425 2.900 H20 A1A3A 75 A1A3A H21 H23 H 0 1 N N N N N N 5.162 8.922 22.726 -1.302 -1.688 4.017 H21 A1A3A 76 A1A3A H22 H24 H 0 1 N N N N N N 3.672 8.861 23.727 -2.349 -0.646 3.026 H22 A1A3A 77 A1A3A H23 H25 H 0 1 N N N N N N 5.272 9.081 24.512 -1.766 -2.197 2.376 H23 A1A3A 78 A1A3A H24 H26 H 0 1 N N N N N N 0.763 8.346 23.237 2.290 -0.805 -3.139 H24 A1A3A 79 A1A3A H25 H27 H 0 1 N N N N N N 2.369 8.417 22.438 1.665 -2.323 -2.451 H25 A1A3A 80 A1A3A H26 H28 H 0 1 N N N N N N 1.115 9.641 22.044 1.208 -1.839 -4.102 H26 A1A3A 81 A1A3A H28 H29 H 0 1 N N N N N N 5.258 3.737 21.971 1.907 2.481 1.411 H28 A1A3A 82 A1A3A H27 H30 H 0 1 N N N N N N 5.431 5.461 22.444 0.594 1.489 2.089 H27 A1A3A 83 A1A3A H29 H31 H 0 1 N N N N N N 0.531 5.600 21.468 -1.870 2.479 -1.600 H29 A1A3A 84 A1A3A H30 H32 H 0 1 N N N N N N 0.513 3.940 20.781 -0.585 1.429 -2.243 H30 A1A3A 85 A1A3A H32 H33 H 0 1 N N N N N N 6.513 -0.059 21.105 9.200 1.360 -1.704 H32 A1A3A 86 A1A3A H31 H34 H 0 1 N N N N N N 5.988 1.114 22.359 7.896 0.359 -1.021 H31 A1A3A 87 A1A3A H34 H35 H 0 1 N N N N N N 0.366 2.009 19.105 -8.192 0.870 -0.065 H34 A1A3A 88 A1A3A H33 H36 H 0 1 N N N N N N -0.356 0.364 19.087 -9.461 1.922 0.607 H33 A1A3A 89 A1A3A H35 H38 H 0 1 N N N N N N 3.980 7.074 30.538 0.017 -4.938 3.684 H35 A1A3A 90 A1A3A H36 H39 H 0 1 N N N N N N 4.650 5.802 29.572 0.825 -6.394 3.904 H36 A1A3A 91 A1A3A H37 H40 H 0 1 N N N N N N 2.074 11.516 15.687 -0.205 -5.038 -3.695 H37 A1A3A 92 A1A3A H38 H41 H 0 1 N N N N N N 1.655 9.836 15.638 -1.055 -6.476 -3.877 H38 A1A3A 93 A1A3A H40 H42 H 0 1 N N N N N N 4.273 2.037 22.521 3.812 2.317 0.367 H40 A1A3A 94 # 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 A1A3A N10 C24 SING N N 1 A1A3A O4 C26 DOUB N N 2 A1A3A C6 C18 SING Y N 3 A1A3A C6 C16 DOUB Y N 4 A1A3A C28 C18 SING N N 5 A1A3A C18 N4 DOUB Y N 6 A1A3A C24 C8 SING N N 7 A1A3A C24 O2 DOUB N N 8 A1A3A C2 C10 DOUB Y N 9 A1A3A C2 C8 SING Y N 10 A1A3A C26 C16 SING N N 11 A1A3A C26 N12 SING N N 12 A1A3A N2 C10 SING Y N 13 A1A3A N2 C20 DOUB Y N 14 A1A3A C16 N8 SING Y N 15 A1A3A C10 C12 SING Y N 16 A1A3A C8 C4 DOUB Y N 17 A1A3A N4 N8 SING Y N 18 A1A3A N8 C36 SING N N 19 A1A3A C20 N12 SING N N 20 A1A3A C20 N6 SING Y N 21 A1A3A C36 C30 SING N N 22 A1A3A C12 N6 SING Y N 23 A1A3A C12 C14 DOUB Y N 24 A1A3A C4 C14 SING Y N 25 A1A3A N6 C34 SING N N 26 A1A3A C14 O6 SING N N 27 A1A3A C29 C35 SING N N 28 A1A3A C34 C22 SING N N 29 A1A3A O6 C32 SING N N 30 A1A3A N3 C17 DOUB Y N 31 A1A3A N3 N7 SING Y N 32 A1A3A C35 N7 SING N N 33 A1A3A C27 C17 SING N N 34 A1A3A C21 C22 DOUB N E 35 A1A3A C21 C33 SING N N 36 A1A3A C17 C5 SING Y N 37 A1A3A N7 C15 SING Y N 38 A1A3A C33 N5 SING N N 39 A1A3A C15 C5 DOUB Y N 40 A1A3A C15 C25 SING N N 41 A1A3A N11 C25 SING N N 42 A1A3A N11 C19 SING N N 43 A1A3A C31 O5 SING N N 44 A1A3A N5 C19 SING Y N 45 A1A3A N5 C11 SING Y N 46 A1A3A O5 C13 SING N N 47 A1A3A C25 O3 DOUB N N 48 A1A3A C19 N1 DOUB Y N 49 A1A3A C11 C13 DOUB Y N 50 A1A3A C11 C9 SING Y N 51 A1A3A C13 C3 SING Y N 52 A1A3A N1 C9 SING Y N 53 A1A3A C9 C1 DOUB Y N 54 A1A3A C3 C7 DOUB Y N 55 A1A3A C1 C7 SING Y N 56 A1A3A C7 C23 SING N N 57 A1A3A C23 O1 DOUB N N 58 A1A3A C23 N9 SING N N 59 A1A3A C4 H4 SING N N 60 A1A3A C5 H5 SING N N 61 A1A3A C6 H6 SING N N 62 A1A3A N12 H39 SING N N 63 A1A3A C21 H7 SING N N 64 A1A3A C22 H8 SING N N 65 A1A3A C28 H12 SING N N 66 A1A3A C28 H13 SING N N 67 A1A3A C28 H14 SING N N 68 A1A3A C1 H1 SING N N 69 A1A3A C2 H2 SING N N 70 A1A3A C3 H3 SING N N 71 A1A3A C27 H11 SING N N 72 A1A3A C27 H10 SING N N 73 A1A3A C27 H9 SING N N 74 A1A3A C29 H17 SING N N 75 A1A3A C29 H15 SING N N 76 A1A3A C29 H16 SING N N 77 A1A3A C30 H19 SING N N 78 A1A3A C30 H18 SING N N 79 A1A3A C30 H20 SING N N 80 A1A3A C31 H21 SING N N 81 A1A3A C31 H22 SING N N 82 A1A3A C31 H23 SING N N 83 A1A3A C32 H24 SING N N 84 A1A3A C32 H25 SING N N 85 A1A3A C32 H26 SING N N 86 A1A3A C33 H28 SING N N 87 A1A3A C33 H27 SING N N 88 A1A3A C34 H29 SING N N 89 A1A3A C34 H30 SING N N 90 A1A3A C35 H32 SING N N 91 A1A3A C35 H31 SING N N 92 A1A3A C36 H34 SING N N 93 A1A3A C36 H33 SING N N 94 A1A3A N9 H35 SING N N 95 A1A3A N9 H36 SING N N 96 A1A3A N10 H37 SING N N 97 A1A3A N10 H38 SING N N 98 A1A3A N11 H40 SING N N 99 # 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 A1A3A SMILES ACDLabs 14.52 "Cc1cc(C(=O)Nc2nc3cc(cc(OC)c3n2C\C=C\Cn2c3c(OC)cc(cc3nc2NC(=O)c2cc(C)nn2CC)C(N)=O)C(N)=O)n(CC)n1" A1A3A InChI InChI 1.06 "InChI=1S/C36H40N12O6/c1-7-47-25(13-19(3)43-47)33(51)41-35-39-23-15-21(31(37)49)17-27(53-5)29(23)45(35)11-9-10-12-46-30-24(16-22(32(38)50)18-28(30)54-6)40-36(46)42-34(52)26-14-20(4)44-48(26)8-2/h9-10,13-18H,7-8,11-12H2,1-6H3,(H2,37,49)(H2,38,50)(H,39,41,51)(H,40,42,52)/b10-9+" A1A3A InChIKey InChI 1.06 YEJJHVBGRSTCLL-MDZDMXLPSA-N A1A3A SMILES_CANONICAL CACTVS 3.385 "CCn1nc(C)cc1C(=O)Nc2nc3cc(cc(OC)c3n2C\C=C\Cn4c(NC(=O)c5cc(C)nn5CC)nc6cc(cc(OC)c46)C(N)=O)C(N)=O" A1A3A SMILES CACTVS 3.385 "CCn1nc(C)cc1C(=O)Nc2nc3cc(cc(OC)c3n2CC=CCn4c(NC(=O)c5cc(C)nn5CC)nc6cc(cc(OC)c46)C(N)=O)C(N)=O" A1A3A SMILES_CANONICAL "OpenEye OEToolkits" 2.0.7 "CCn1c(cc(n1)C)C(=O)Nc2nc3cc(cc(c3n2C/C=C/Cn4c5c(cc(cc5OC)C(=O)N)nc4NC(=O)c6cc(nn6CC)C)OC)C(=O)N" A1A3A SMILES "OpenEye OEToolkits" 2.0.7 "CCn1c(cc(n1)C)C(=O)Nc2nc3cc(cc(c3n2CC=CCn4c5c(cc(cc5OC)C(=O)N)nc4NC(=O)c6cc(nn6CC)C)OC)C(=O)N" # 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 A1A3A "SYSTEMATIC NAME" ACDLabs 14.52 "1,1'-[(2E)-but-2-ene-1,4-diyl]bis{2-[(1-ethyl-3-methyl-1H-pyrazole-5-carbonyl)amino]-7-methoxy-1H-1,3-benzimidazole-5-carboxamide}" A1A3A "SYSTEMATIC NAME" "OpenEye OEToolkits" 2.0.7 "1-[(~{E})-4-[5-aminocarbonyl-2-[(2-ethyl-5-methyl-pyrazol-3-yl)carbonylamino]-7-methoxy-benzimidazol-1-yl]but-2-enyl]-2-[(2-ethyl-5-methyl-pyrazol-3-yl)carbonylamino]-7-methoxy-benzimidazole-5-carboxamide" # loop_ _pdbx_chem_comp_audit.comp_id _pdbx_chem_comp_audit.action_type _pdbx_chem_comp_audit.date _pdbx_chem_comp_audit.processing_site A1A3A "Create component" 2024-08-23 RCSB A1A3A "Initial release" 2025-06-18 RCSB #