2-(1,4-Dihydro-5-hydroxy-1,4-dioxo-2-naphthalenyl)-3-methoxy-5-methylbenzoic acid 76191-52-1 Antibiotic WS 5995B BRN 5993552 Benzoic acid, 2-(1,4-dihydro-5-hydroxy-1,4-dioxo-2-naphthalenyl)-3-methoxy-5-methyl- WS-5995 B WS-5995B