InChI=1S/C18H27NO5/c1-6-10(3)17(21)23-12-8-13-15(20)16(14(9-12)19(13)5)24-18(22)11(4)7-2/h6-7,12-16,20H,8-9H2,1-5H3/b10-6+,11-7+