3,3'-Diethyl-9-methyl-2,2'-thiacarbocyanine ethosulfate 67800-91-3 Benzothiazolium, 3-ethyl-2-(3-(3-ethyl-2(3H)-benzothiazolylidene)-2-methyl-1-propenyl)-, ethyl sulfate EINECS 267-115-8 Ethyl 3-ethyl-2-(3-(3-ethyl-3H-benzothiazol-2-ylidene)-2-methylprop-1-enyl)benzothiazolium sulphate