InChI=1S/C19H32O4/c20-15-13-11-9-7-5-3-1-2-4-6-8-10-12-14-16-23-18-19(22)17-21/h6,8,14,16,19-22H,1-5,7,9,11,13,15,17-18H2/b8-6-,16-14-/t19-/m0/s1