Sustained-release preparation for bioactive substance having an acidic group
申请人:TAKEDA CHEMICAL INDUSTRIES, LTD.
公开号:EP0815853A2
公开(公告)日:1998-01-07
A sustained-release preparation comprising a bioactive substance having an acidic group and a biodegradable polymer having an optionally protected basic group improves the rate of incorporation of the bioactive substance, suppresses its leakage early after administration, and exhibits constantly suppressed release for an extended period of time.
a derivative (13) with superior activity against the Plasmodium falciparum 3D7 strain than fosmidomycin, while a gamma-oxa modification resulted in less active derivatives. A bis(pivaloyloxymethyl)ester of phosphonate 13 proved twice as active in inhibiting cultured parasites as a similar prodrug of FR900098.