International Journal of Chemistry and Materials Research 2311-763X 5 1 Synthesis and Cytotoxicity of Thiophene, Thieno[2,3-C]Pyrazole, Thieno[2,3-D]Pyrimidine and Pyridine Derivatives Derived from 2-Acetylfuran 1 14 10.18488/journal.64.2017.51.1.14