6-methoxy-4,5,8,9-tetrakis(phenylmethoxy)naphtho<2,3-c>furan-1,3-dione
3-(diethoxymethyl)-1-methoxy-9-(methoxymethoxy)-8H-cyclopent
4-hydroxy-2,3-dihydroindan-1-one
2,2-diethoxyacetonitrile
dimethyl 3,6-dioxocyclohexa-1,4-diene-1,2-dicarboxylate