00642nam a22001457a 4500003000400000020001800004082001100022100002500033245002800058250000800086260003100094300000800125650002300133653034000156SGT  a9788131707937  a547.59  aGILCHRIST L. THOMAS   aHETEROCYCLIC CHEMISTRY   a3RD  aNEW DELHI bPEARSON c2013  a414  aORGANIC CHEMISTRY   aIntroduction, Aromatic Heterocycles, Nonaromatic Heterocycles, Methods of Ring Synthesis, Six-membered Rings, Five-membered Rings with One Heteroatom, Six-membered Rings with Two or More Heteroatoms, Five-membered Rings with Two or More Heteroatoms, Three and Four Membered Rings, Seven and Larger Membered Ring Compounds, Nomenclature