InChI=1S/C19H28O4/c1-3-4-8-11-16-17(20)13-15-19(16,22)14-10-7-5-6-9-12-18(21)23-2/h4,8,11,13,15,22H,3,5-7,9-10,12,14H2,1-2H3/b8-4+,16-11+/t19-/m0/s1