InChI=1S/C17H24O4/c1-10(18)21-14-7-8-17(4)12-9-20-15(19)11(12)5-6-13(17)16(14,2)3/h5,12-14H,6-9H2,1-4H3/t12-,13-,14-,17+/m0/s1