InChI=1S/C21H30O4/c1-4-14(2)5-7-17-18-9-10-24-20(18)11-15-13-25-16(12-19(15)17)6-8-21(22)23-3/h5,7,9-10,14-17,19H,4,6,8,11-13H2,1-3H3/b7-5+/t14?,15-,16+,17+,19-/m1/s1