4,13-dioxabicyclo[8.2.1]tridecenone compounds and pharmaceutical
4,7-dichlorofluorescein dyes as molecular probes
4,7-dichlorofluorescein dyes as molecular probes
4-amino-3-halo-2-pyridinone nucleoside and nucleotide compounds
4-Amino-4-dehydroxy derivatives of efrotomycin and related compo
4-demethoxy-13-dihydrodaunorubicin and use thereof
4-Demethoxy-3'-desamino-2'-halo-anthracycline and pharmaceutical
4-demethoxy-4'-amino-4'-deoxy-anthracycline derivatives
4-O-(aminoglycosyl)- or 4,6-di-O-(aminoglycosyl)-2,5-dideoxy-5,5
4.alpha.-substituted avermectin derivatives