6,6-(2,2-Dimethyltrimethylendioxy)-3-oxoheptansaeure-methylester

13-Ethyl-3,5-seco-A-nor-9-gonen-2,5,17-trion

(+)-18-homo-4-nor-3,5-secoestrane-2,5,17-trione

5,5-(2,2-Dimethyltrimethylendioxy)-2-hexanon

2-<4-(carboxymethyl)-3-oxobutyl>-2-methyl-1,3-dioxolane