light yellow:crystal It can be extracted from camptotheca or marblerley. Light yellow needle crystal(methanol-acetonitrile), decomposition point: 264°C~267°C, [α]25D +31.3 (chloroform-methanol). Its Molecular weight is 348.35 and Molecular formula is C20H16N2O4. It appears blue luminescence in ultraviolet radiation. Its period of validity is 3 years.It can not form stable salt with acid. The monthly output of camptothecin is 200kg.
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