InChI=1S/C21H30O4/c1-3-4-5-6-7-8-9-10-18(22)16-19(23)13-11-17-12-14-20(24)21(15-17)25-2/h11-16,23-24H,3-10H2,1-2H3/b13-11-,19-16-