NAPHTHO[1,2-D]THIAZOLIUM,1-ETHYL-2-[[3-ETHYL-5-[(1-ETHYL-4-1H-QUINOLINYLIDENE)ETHYLIDENE]-4-OXO-2-THIAZOLIDINYLIDENE]METHYL]-,SALT WITH 4-METHYLBENZENESULFONIC ACID (1:1)