JV-Formyl group

The JV-formyl group is stable providing hot aqueous acid or alkaline conditions are avoided. Deprotection is affected by prolonged hot alkaline hydrolysis, or in the case of protected amino acids, by oxidative225 or reductive procedures.226... 

It had been demonstrated earlier that the JV-formyl group did not arise from the N-ethyl group during the oxidation therefore, some of the conflicting data can be explained on the basis of the mesaconitine impurity in aconitine. 

From Zizyphus sativa (Rhamnaceae), discarine-related 13-membered cyclopeptide alkaloids, sativanines C (1) (14), D (57), E (2), F (3) (15-17), and G (4) (18) have been isolated. Ilie bark of Z. sativa is used to heal ulcers and wounds. Extensive chromatography of the crude bases furnished a further, previously unknown, 13-membered cyclopeptide alkaloid sativan-ine H (5) (79). Sativanine K (6) has been obtained from the powdered bark of Z. sativa. This is the first 13-membered cyclopeptide alkaloid to contain an JV-formyl group as well as a short side chain (20). A new, minor... 

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