Synonyms-(Acetyloxy)-5-hydroxy-9,10-dioxo-9,10-dihydroanthracene-2-carboxylic acid; monoacetyl rhein isomer B (EP) ; 4-Acetyl Rhein Close -(Acetyloxy)-5-hydroxy-9,10-dioxo-9,10-dihydroanthracene-2-carboxylic acid; monoacetyl rhein isomer B (EP) ; 4-Acetyl Rhein Related products Diacerein M.F. M.W. 368.29 CAT# AR-D02780 CAS# 13739-02-1 Diacerein EP Impurity E M.F. M.W. 326.3 CAT# AR-D06045 CAS# 875535-36-7