91776-45-3 Fibrostatin F L-CYSTEINE, N-ACETYL-S-((5,8-DIHYDRO-3,6-DIMETHOXY-5,8-DIOXO-1-HYDROXY-7-(HYDROX L-Cysteine, N-acetyl-S-((5,8-dihydro-3,6-dimethoxy-5,8-dioxo-1-hydroxy-7-(hydroxymethyl)-2-naphthalenyl)methyl)-