InChI=1/C16H19N2O3PS/c1-4-20-22(19,21-5-2)11-10-15-12(3)18-14-9-7-6-8-13(14)17-16(18)23-15/h6-11H,4-5H2,1-3H3/b11-10 diethyl [2-(3-methyl[1,3]thiazolo[3,2-a]benzimidazol-2-yl)vinyl]phosphonate phosphonic acid, [2-(3-methylthiazolo[3,2-a]benzimidazol-2-yl)ethenyl]-, diethyl ester