InChI=1S/C17H24NO3/c1-18(2)13-8-9-14(18)11-15(10-13)21-17(20)16(19)12-6-4-3-5-7-12/h3-7,13-16,19H,8-11H2,1-2H3/q+1/t13-,14+,15+,16?