InChI=1S/C18H19NO3S/c1-19-10-9-16(17-6-3-11-23-17)22-15-5-2-4-13-12(15)7-8-14(20)18(13)21/h2-8,11,16,19-21H,9-10H2,1H3/t16-/m0/s1