51716-62-2

7,7-ethylenedioxy-3-oxo-cis-bicyclo[3.3.0]octane cis-Bicyclo[3.3.0]octane-3,7-dione monoethylene ketal (3aR,6aS)-7,7-(ethylidene acetal)bicyclo[3.3.0]octan-3-one hexahydro-1'H-spiro[1,3-dioxolane-2,2'-pentalene]-5'-one, cis Cis-tetrahydro-1'H-spiro[[1,3]dioxolane-2,2'-pentalen]-5'(3'H)-one rel-(3aR,6aS)-Tetrahydro-1H-spiro[pentalene-2,2'-[1,3]dioxolan]-5(3H)-one (3a'R,6a'S)-tetrahydro-1'H-spiro[[1,3]dioxolane-2,2'-pentalen]-5'(3'H)-one Spiro[1,3-dioxolane-2,2'(1'H)-pentalen]-5'(3'H)-one, tetrahydro-, (3'aR,6'aS)-rel-