(-)-.alpha.-Conidendrin .alpha.-Conidendrin 518-55-8 CONIDENDRIN,ALPHA NSC4586 Naphtho[2,3-c]furan-1(3H)-one, 3a,4,9,9a-tetrahydro-6-hydroxy-4-(4-hydroxy-3-methoxyphenyl)-7-methoxy-, [3aR-(3a.alpha.,4.alpha.,9a.beta.)]- Naphtho[2,3-c]furan-1(3H)-one, 3a.alpha.,4,9,9a.beta.-tetrahydro-6-hydroxy-4.alpha.-(4-hydroxy-3-methoxyphenyl)-7-methoxy-