[8,8'-Bi-1H-naphtho[2,3-c]pyran]-1,1',6,9-tetrone,3,3',4,4'-tetrahydro-9',10,10'-trihydroxy-7,7'-dimethoxy-3,3'-dimethyl-,[R-(R*,R*)]-; 1H-Naphtho[2,3-c]pyran, bimol. deriv.; Viomellein
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