(8,8'-Bi-1H-naphtho(2,3-c)pyran)-1,1'-dione, 3,3',4,4'-tetrahydro-9,9'10,10'-tetrahydroxy-7,7'-dimethoxy-3,3'-dimethyl-, (R-(R*,R*))- (R-(R*,R*))-3,3',4,4'-Tetrahydro-9,9'10,10'-tetrahydroxy-7,7'-dimethoxy-3,3'-dimethyl- (8,8'-bi-1H-naphtho(2,3-c)pyran)-1,1'-dione 15447-05-9 Tf-26Vx Vioxanthin