Corticoid 17, 21-dicarboxylic esters and corticosteroid 17-carboxylic ester 21-carbonic esters, processes for their preparation and pharmaceuticals containing these compounds.

The formulation comprises a glyphosate or a salt, ester or other derivative thereof, a dicarboxylic acid or a derivative thereof, and a pharmaceutically acceptable vehicle.

This paper reports the synthesis of a series of poly (silyl ester)s by diacetoxylsilane with several dicarboxylic acid.