OER
  -OEChem-10252416403D

 10 15  0     1  0  0  0  0  0999 V2000
  -26.8960   36.9270  -61.3580 O   0  0  2  0  0  0  0  0  0  0  0  0
  -25.2170   35.7940  -60.9790 Mn  0  0  0  0  0  0  0  0  0  0  0  0
  -28.1050   36.9360  -59.2580 Sr  0  2  0  0  0  0  0  0  0  0  0  0
  -28.2720   34.9070  -60.9460 O   0  0  1  0  0  0  0  0  0  0  0  0
  -27.5840   35.4790  -62.4520 Mn  0  0  0  0  0  0  0  0  0  0  0  0
  -26.2260   34.2640  -61.5970 O   0  3  2  0  0  0  0  0  0  0  0  0
  -27.5410   33.4980  -60.2790 Mn  0  0  0  0  0  0  0  0  0  0  0  0
  -28.6410   32.9240  -59.0690 O   0  0  0  0  0  0  0  0  0  0  0  0
  -27.8470   33.3770  -57.4360 Mn  0  0  0  0  0  0  0  0  0  0  0  0
  -26.4180   35.0850  -58.7330 O   0  5  1  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  1  5  1  0  0  0  0
  2  6  1  0  0  0  0
  4  5  1  0  0  0  0
  4  7  1  0  0  0  0
  5  6  1  0  0  0  0
  6  7  1  0  0  0  0
  7  8  1  0  0  0  0
  7 10  1  0  0  0  0
  8  9  1  0  0  0  0
  3  4  1  0  0  0  0
  3 10  1  0  0  0  0
  1  3  1  0  0  0  0
  9 10  1  0  0  0  0
  2 10  1  0  0  0  0
M  CHG  3   3   2   6   1  10  -1
M  END
> <OPENEYE_ISO_SMILES>
O1[Mn][O@@-]23[Mn]14[O@]5[Sr+2]2[O@@]6[Mn]5[O@+]4[Mn]36

> <OPENEYE_INCHI>
InChI=1S/4Mn.5O.Sr/q;;;;;;;-1;+1;+2

> <OPENEYE_INCHIKEY>
CSESTIVEXPKVIG-UHFFFAOYSA-N

> <FORMULA>
Mn4O5Sr+2

$$$$