InChI=1S/C18H28O5/c1-10(19)23-13-11-6-15(2,3)7-12(11)16(4)8-17(16)14(21-5)22-9-18(13,17)20/h11-14,20H,6-9H2,1-5H3/t11-,12+,13+,14-,16-,17+,18+/m1/s1