InChI=1S/C15H22O4/c1-8-6-12(16)10-7-15(19-13(17)9(10)2)11(8)4-5-14(15,3)18/h8,10-12,16,18H,2,4-7H2,1,3H3/t8-,10+,11-,12-,14+,15+/m0/s1