InChI=1S/C21H29NO4/c1-10(2)11-9-12-13(16(24)15(11)23)21-8-6-7-20(3,4)18(21)17(14(12)22-5)26-19(21)25/h9-10,14,17-18,22-24H,6-8H2,1-5H3