InChI=1S/C20H25NO3/c1-13(2)17(22)10-12-20(3)11-9-15-18(24-20)14-7-5-6-8-16(14)21(4)19(15)23/h5-9,11,13,17,22H,10,12H2,1-4H3/t17-,20+/m1/s1