11-Methoxy-5,6-dihydroyangonin 2H-pyran-2-one, 6-[(E)-2-(3,4-dimethoxyphenyl)ethenyl]-5,6-dihydro-4-methoxy-, (6R)- 6-[(E)-2-(3,4-dimethoxyphenyl)vinyl]-4-methoxy-5,6-dihydro-2H-pyran-2-one 6-[2-(3,4-Dimethoxy-phenyl)-vinyl]-4-methoxy-5,6-dihydro-pyran-2-one InChI=1/C16H18O5/c1-18-13-9-12(21-16(17)10-13)6-4-11-5-7-14(19-2)15(8-11)20-3/h4-8,10,12H,9H2,1-3H3/b6-4+/t12-/m0/s