22268-66-2 3-Ethyl-2-(7-(3-ethylbenzothiazol-2-ylidene)-1,3,5-heptatrienyl)benzothiazolium perchlorate Benzothiazolium, 3-ethyl-2-(7-(3-ethyl-2(3H)-benzothiazolylidene)-1,3,5-heptatrienyl)-, perchlorate