1867-82-9 2',2''',4',6',6'''-Pentahydroxy-4'''-methoxy-3',3'''-methylenebis(5'-methylbutyrophenone) BRN 2067959 BUTYROPHENONE, 2',2''',4',6',6'''-PENTAHYDROXY-4'''-METHOXY-3',3'''-METHYLENEBIS Butyrophenone, 2',2''',4',6',6'''-pentahydroxy-4'''-methoxy-3',3'''-methylenebis(5'-methyl- Margaspidin Margaspidin BB Margaspindin