Vinca AlkaloidsAlkaloidsVincaVinblastineVincristineErgot AlkaloidsVindesineAntineoplastic Agents, PhytogenicTubulinIndole AlkaloidsPodophyllotoxinPyrrolizidine AlkaloidsLeukemia P388MicrotubulesDrug ResistanceTubulin ModulatorsP-GlycoproteinAntimitotic AgentsMaytansineColchicineCinchona AlkaloidsDrug AntagonismBerberine AlkaloidsAntineoplastic AgentsDaunorubicinDrug Screening Assays, AntitumorDoxorubicinSarcoma 180Drug Resistance, MultipleAmaryllidaceae AlkaloidsVerapamilMitosisDrug Resistance, NeoplasmCatharanthusMolecular StructureAconitumAnthracyclines