80455-68-1 Fcrc-A48 Fredericamycin Fredericamycin A NSC-305263 Spiro(2H-benz(f)indene-2,8'-(8H)cyclopent(g)isoquinoline)-1,1',3,5,8(2'H)-pentone, 6',7'-dihydro-4,9,9'-trihydroxy-6-methoxy-3'-(1,3-pentadienyl)-, (E,E)- Spiro(2H-benz(f)indene-2,8'-(8H)cyclopent(g)isoquinoline)-1,1',3,5,8,(2'H)-pentone, 6',7'-dihydro-4,9,9'-trihydroxy-6-methoxy-3'-(1,3-pentadienyl)-, (E,E)-