3-Ethyl-5-[2-[1,3,3-trimethyl-1,3-dihydro-indol-(2Z)-ylidene]-eth-(Z)-ylidene]-thiazolidin-4-one 、 1,2,3,4-tetrahydro-benzo[4,5]thiazolo[3,2-
a]pyridinylium; iodide 在
吡啶 作用下,
生成
4-<4-Oxo-3-aethyl-5-(2-(1,3,3-trimethyl-indolenyliden-(2))-aethyliden)-thiazolinyliden-(2)>-1,2,3,4-tetrahydro-pyrido<2,1-b>benzthiazolium