00317pam a2200121 a 4500020002000000041000800020082001600028100002100044245005200065260003000117300000900147653003900156  a9788131220368c  aeng  a615.19bVAR  aVardanan, Ruben.  aSynthesis of Essential DrugshTextual Documents  aNew DelhibElsevierc2006  a617.  aPharmaceutical/Medicinal Chemistry