Chaturvedi, Radha Nandan Synthesis and modification of some heterocyclic compounds with potential biological activity specific reference to Nitrogen containing heterocyclic compounds / Radha Nandan Chaturvedi - New Delhi : IGNOU, 2017. - xiii, 251 pages : ill. ; 29 cm Subjects--Topical Terms: Heterocyclic compounds Dewey Class. No.: 547.59 C392S