7187-66-8 TRIMETHAPHAN Thieno(1',2':1,2)thieno(3,4-d)imidazol-5-ium, decahydro-2-oxo-1,3-bis(phenylmethyl)- Thieno(1',2':1,2)thieno(3,4-d)imidazol-5-ium, decahydro-2-oxo-1,3-bis(phenylmethyl)- (VAN) Thimethaphan Trimetaphan Trimetaphanum