3-Piperonylcyclobutanone

4-[(3,4-methylenedioxy)benzyl]furan-2(5H)-one

4-(3',4'-methylenedioxyphenyl)-3-methoxycarbonyl-3-butanoic acid potassium salt

(E)-3-[3,4-(methylenedioxy)benzylidene]butyrolactone

2,2-dichloro-3-(3,4-methylenedioxybenzyl)cyclobutanone