(8,8'-Bi-2H-furo(3,2-b)naphtho(2,3-d)pyran)-2,2',6,6'11,11'-hexone, 3,3',3a,3'a,5,5',11b,11'b-octahydro-10,10'-dihydroxy-5,5'-dimethyl-, (3aS-(3aalpha,5alpha,8(3aR*,5R*,11bR*),11balpha))- 95828-47-0 CRS-A Crisamicin A