94047 ⎘
Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with one oxygen atom directly attached in position 2, e.g. beta-lactams with a sulfur atom directly attached in position 4 and with a nitrogen atom directly attached in position 3
Methods of synthesizing aztreonam derivatives
#2PRODRUG DERIVATIVES OF ACIDS USING ALCOHOLS WITH HOMOTOPIC HYDROXY GROUPS AND METHODS FOR THEIR PREPARATION AND USE
#3Prodrug derivatives of acids using alcohols with homotopic hydroxy groups and methods for their preparation and use