ethyl 5-(benzo[d][1,3]dioxol-5-yl)-3-methoxy-5-oxopent-2-enoate

methyl 6-(benzo[d][1,3]dioxol-5-yl)-4-(methylthio)-2-oxo-2H-pyran-3-carboxylate

ethyl (E)-4-bromo-3-methoxy-2-butenoate

ethyl (E)-δ-cyano-δ-(3',4'-(methylenedioxy)phenyl)-β-methoxy-δ-(4-morpholino)pent-2-enoate

α-3,4-(methylenedioxy)phenyl-α-(4-morpholino)acetonitrile