摘要:
The present invention relates to compounds of formula I
and the pharmaceutically acceptable salts and esters thereof wherein X 1 , X 2 , R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are defined as in claim. The compounds exhibit activity as anticancer agents.
and the pharmaceutically acceptable salts and esters thereof wherein X 1 , X 2 , R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are herein described. The compounds exhibit activity as anticancer agents.
摘要:
β-Lactam compounds of the formula in which R₁ is a cyclic or secondary acyclic amino group which independently has antibacterial activity; R₂ is hydrogen, lower alkoxy, lower alkylthio or formamido; R₃ is hydrogen or an organic group bonded through carbon, oxygen, sulfur or nitrogen; R₄ is an electronegative acidic group; or R₃ and R₄ together form a heterocycle; and R₅ is hydrogen or lower alkyl, except when R₃ and R₄ form a heterocycle, in which case R₅ is hydrogen only; and readily hydrolyzable esters and pharmaceutically acceptable salts of these compounds, and hydrates of any of the foregoing. The products have antibacterial activity.