((3alpha,3'alpha,4beta,4'beta)-3,3')-dimethoxy-cis-(4,4'-bis(3,4,5,10-tetrahydro-1H-naphtho(2,3-)pyran))-5,5',10,10'-tetraone
((3alpha,3'alpha,4beta,4'beta)-3,3')-dimethoxy-cis-(4,4'-bis(3,4,5,10-tetrahydro-1h-naphtho(2,3-)pyran))-5,5',10,10'-tetraone