InChI=1S/C21H27N3O4S/c1-16-15-22(18-7-9-19(10-8-18)24(25)26)13-14-23(16)29(27,28)20-11-5-17(6-12-20)21(2,3)4/h5-12,16H,13-15H2,1-4H3/t16-/m1/s1