(9,9'-BI-4H-NAPHTHO(2,3-b)PYRAN)-4,4'-DIONE, 2,2',3,3'-TETRAHYDRO-5,5',6,6',8,8' (9,9'-Bi-4H-naphtho(2,3-b)pyran)-4,4'-dione, 2,2',3,3'-tetrahydro-5,5',6,6',8,8'-hexahydroxy-2,2',3,3'-tetramethyl- 75514-37-3 Bis(naphthodihydropyran-4-one) Chaetochromin NSC 345647