IDO Pathway inhibitor 250MG. IDO Pathway inhibitor, An IDO pathway inhibitor, CAS: 110117-83-4, Molecular Formula: C12H14N2O2, Molecular Weight: 218. 25, Purity: greater than or equal to 95%, Appearance: White to off-white solid, Synonym: 1-Methyl-D-tryptophan Indoximod, Size: 250MG