Synthesis, Chemical, and Biological Evaluation of Actinomycin Tetracyclic Oxazinone Derivatives and Application to Small-Molecule Drug Conjugates
Actinomycin D (1) is a chromopeptide antibiotic natural product used in the treatment of various malignancies, although its clinical use is limited by high toxicity. Tetracyclic actinomycin oxazinone derivatives have been reported to generate 1 through hydrolysis under physiological conditions, but detailed mechanist...