InChI=1S/C17H23NO4S/c1-18-9-8-17-7-3-2-4-14(17)16(18)10-12-5-6-13(11-15(12)17)22-23(19,20)21/h5-6,11,14,16H,2-4,7-10H2,1H3,(H,19,20,21)/t14-,16+,17+/m1/s1