InChI=1S/C15H22O5/c1-10(6-13(18)19)4-5-15(20)11(2)7-12(17)8-14(15,3)9-16/h4-7,12,16-17,20H,8-9H2,1-3H3,(H,18,19)/b5-4+,10-6+