InChI=1S/C14H16N2O3S/c1-8-12(18)16-11-9(5-4-6-10(11)17)7-14(16,20-3)13(19)15(8)2/h4-6,10-11,17H,1,7H2,2-3H3/t10-,11-,14+/m0/s1