InChI=1S/C16H23NO3/c1-9-7-16-12-3-2-4-17(16)8-10(9)5-13(16)11(15(19)20)6-14(12)18/h5,9-12,14,18H,2-4,6-8H2,1H3,(H,19,20)/t9-,10?,11-,12+,14+,16-/m0/s1