InChI=1S/C16H25NO3/c1-9-7-10(2)13(11(3)16(4,20)8-9)14-12(18)5-6-17-15(14)19/h5-6,9-11,13,20H,7-8H2,1-4H3,(H2,17,18,19)/t9-,10+,11+,13-,16+/m1/s1