3',7'-Dihydroxy-2'-(hydroxymethyl)-2',4',7'-trimethyl-2',7'-dihydrospiro[cyclopropane-1,5'-inden]-6'(3'H)-one;spiro[cyclopropane-1,5'-[5H]inden]-6'(3'H)-one, 2',7'-dihydro-3',7'-dihydroxy-2'-(hydroxymethyl)-2',4',7'-trimethyl-
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