67278-88-0 7,15a,7a,15-(1,2,3,4)Butanetetrayl-7aH,15aH-pentaleno(1,6a-b:3a,4-b')dinaphthalene-5,6,8,13,14,16(7H,15H)-hexone, 4,12-dihydroxy-17,20-dimethoxy-2,10-dimethyl-, stereoisomer CCRIS 4403 Rugulin