Sub Group: Standards - 13C & 2H for GC-Mass Spectrometry Catalog Number: D2237 Enrichment: 93%D Formula: HO(CH3O)C6H3CD(OH)COOH CAS Number: 53587-34-1 Molecular Weight: 199.18 Synonyms: (Vanillomandelic AcidVMA, Vanillylmandelic acid, Vanillyl mandeli