75693-71-9 Naphth(2',1':4,5)imidazo(2,1-b)thiazole, 5,6,6a,9,10,11a-hexahydro-, (E)- trans-5,6,6a,9,10,11a-Hexahydronaphth(2',1':4,5)imidazo(2,1-b)thiazole