21884-45-7 5H,6H-6,13a,5a,14-(1,2,3,4)Butanetetraylcycloocta(1,2-b:5,6-b')dinaphthalene-5,8,13,16(14H)-tetrone, 1,7,9,15,17,20-hexahydroxy-3,11-dimethyl-, (5aR-(5aR*,6S*,13aR*,14S*,17R*,18S*,19S*,20R*))- Rugulosin, (1S,1'S,2R,2'R,3S,3'S,9aR,9'aR)-