4,6-0-hydroxyphosphoryl-glucosamine derivatives
4,6-di-o-(aminoglycosyl)-1,3-diaminocyclitols, process for...
4,7-dialkoxy-n-acetylneuraminic acid derivatives and methods...
4-demethoxy anthracycline derivatives
4-demethoxy-3'-desamino-2'-halo-anthracycline anti- cancer...
4-ethoxy 5-fluoro 2'deoxyuridine
4-n-acyl, 2'-n-acyl and 4,2'-n,n-diacyl fortimicin e...
4-n-acylfortimicin b derivatives and the chemical conversion...
4-n-substituted sialic acids and their sialosides
4-substituted anthracyclinones and their preparation
42-oxorapamycin
4a-substituted avermectin derivatives