cis,trans-4-methylene-1-(3,4-methylenedioxyphenyl)-2-nitrocyclopentane

(5S*,6S*)-8-methylene-6-(3,4-methylenedioxyphenyl)-1-azaspiro<4.4>nonan-2-one

(5S*,6S*)-6-(3,4-methylenedioxyphenyl)-1-azaspiro(4.4)nonan-2,8-dione

(5S*,6S*)-6-(3,4-methylenedioxyphenyl)-1-azaspiro[4.4]nonan-9-one ethylene acetal

methyl (1S*,2S*)-3-[4-methylene-2-(3,4-methylenedioxyphenyl)-1-nitrocyclopent-1-yl]propionate