InChI=1S/C18H26O5/c1-10-7-13(23-11(2)20)15-14(12(10)8-19)18(5,16(21)22-6)9-17(15,3)4/h8,10,13,15H,7,9H2,1-6H3/t10-,13+,15-,18+/m1/s1