.beta.-Conidendrin 5474-93-1 AIDS-160645 AIDS160645 NSC4587 NSC642787 Naphtho[2,3-c]furan-1(3H)-one, 3a,4,9,9a-tetrahydro-6-hydroxy-4-(4-hydroxy- 3-methoxyphenyl)-7-methoxy-, (3aR,4S,9aS)-