InChI=1S/C15H22O5/c1-8(17)13(18)10-5-4-9-6-12(15(2,3)19)20-14(9)11(10)7-16/h4-5,8,12-13,16-19H,6-7H2,1-3H3/t8-,12?,13+/m0/s1