VIOXANTHIN

(3R,3'R)-3,3'-Dimethyl-7,7'-dimethoxy-9,9',10,10'-tetrahydroxy-3,3',4,4'-tetrahydro-8,8'-bi[1H-naphtho[2,3-c]pyran]-1,1'-dione

(3R,3'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