3-Ethyl-2-(3-(3-ethyl-2-thiazolidinylidene)-1-propenyl)-2-thiazolinium, p-toluenesulfonate 67874-23-1 Thiazolium, 3-ethyl-2-(3-(3-ethyl-2-thiazolidinylidene)-1-propenyl)-4,5-dihydro-, salt with 4-methylbenzenesulfonic acid (1:1)