Propitious hypolipidemic activity has been reported in droves of 2- substitutedthieno(2,3-d)pyrimidines. Earlier 2-(chloromethyl)-5,6,7,8-tetrahydro(1) benzothieno(2,3-d)pyrimidin-4(3H)-one (I, LM-1554, CAS89567-03-3) have been extensively evaluated pharmacologically and toxicologically for hypolipidemic activities. Its 4-chloro analog (II) recently revealed much supercilious activity to it. Scientific exploration and clinical studies have already archieved the importance of Niacin (Vitamin B3) in reducing blood cholesterol levels and other consequential risk factors in the blood. Further, it also documented to contribute in the repair of artery wall. With this rationalization, the synthesis & biological evaluation of novel mutual prodrugs composing the LM 1554 nucleus and vitamin B3 molecule was ventured through the consecutive synthetic routes.