5-Trityl-5,6,7,7a-tetrahydrothieno[3,2-c]pyridin-2(4H)-one109904-26-9100 % similar 5,6,7,7A-Tetrahydrothieno[3,2-C]pyridin-2(4H)-one hydrochloride (1:1)115473-15-935 % similar Trifenmorph1420-06-035 % similar