00269nam a2200109Ia 4500008004000000082001300040100001900053245002300072260003000095300001200125650002200137210210b1971   xxu||||| |||| 00| 0 eng d  a547 SINO  aSINGH (Nazar).  aOrganic chemistry.  aN DbOrient Longmanc1971  axii,224  aOrganic Chemistry