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Objective Although catharanthine (1) is well known as a biosynthetic precursor of the anticancer alkaloid, vinblastine, its alternative metabolic pathways are unclear. Results Biotransformation of 1 by suspension-cultured cells of Catharanthus roseus gave a new oxidative-cleavage product (2). The structure of 2 was determined as 3-hydroxy-4-imino-catharanthine by spectroscopic methods. Maximum conversion...
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