Synonyms: NAPHTHO[1,2-D]THIAZOLIUM, 1-ETHYL-2-[[3-[(1-ETHYLNAPHTHO[1,2-D]THIAZOL-2(1H)-YLIDENE)METHYL]-2,5,5-TRIMETHYL-2-CYCLOHEXEN-1-YLIDENE]METHYL]-, SALT WITH 4-METHYLBENZENESULFONIC ACID (1:1);1-ETHYL-2-[(3-([1-ETHYLNAPHTHO[1,2-D][1,3]THIAZOL-2(1H)-YLIDENE]METHYL)-2,5,5-TRIMETHYL-2-CYCLOHEXEN-1-YLIDENE)METHYL]NAPHTHO[1,2-D][1,3]THIAZOL-1-IUM 4-METHYLBENZENESULFONATE