O-methyl Sterigmatocystin

O-methyl Sterigmatocystin (OMST) is a xanthone found in several fungal species including A. flavus, A. parasiticus, A. versicolor, and B. piluliferum. It is a carcinogenic precursor of aflatoxin G1 (Cay-11295) and aflatoxin B1 (Cay-11293) that is a known contaminant of agricultural soils. OMST is cytotoxic against NCI-H187 human small cell lung cancer cells and African green monkey kidney (Vero) cells (IC50s = 62.2 and 0.65 mM, respectively).Formal Name: 3aR,12cS-dihydro-6,8-dimethoxy-7H-furo[3',2':4,5]furo[2,3-c]xanthen-7-one. CAS Number: 17878-69-2. Synonyms: OMST. Molecular Formula: C19H14O6. Formula Weight: 338.3. Purity: >95%. Formulation: (Request formulation change), A solid. Solubility: DMF: Soluble, DMSO: Soluble. SMILES: O=C(C(C(OC)=CC=C1)=C1O2)C3=C2C([C@@](C=CO4)([H])[C@@]4([H])O5)=C5C=C3OC. InChi Code: InChI=1S/C19H14O6/c1-21-10-4-3-5-11-15(10)17(20)16-12(22-2)8-13-14(18(16)24-11)9-6-7-23-19(9)25-13/h3-9,19H,1-2H3/t9-,19+/m0/s1. InChi Key: JKUJKKGMOZDDJV-ZRNGKTOUSA-N. Origin: Fungus/Chaetomium sp..