108890-89-7 2H-Furo(3,2-b)naphtho(2,3-d)pyran-2,6,11-trione, 3,3a,5,11b-tetrahydro-7-hydroxy-8-methoxy-5-methyl-, (3aR-(3aalpha,5alpha,11balpha))- Arizonin B1 Arizonin-B1