Cyclopurpuracin, a cyclopeptide from Annona purpurea seeds
2018
González-Tepale, María Rosa | Reyes, Lino | Mayorga-Flores, Marlen | Reyes-Trejo, Benito | Gómez-Zepeda, David | Rio-Portilla, Federico del | Ordaz-Ortiz, José Juan | Herbert-Pucheta, José Enrique
From a 60% hydroalcoholic extract of the seeds of Annona purpurea, a novel cyclooctapeptide, cyclopurpuracin (1), or cyclo(-Pro1-Gly2-Phe3-ILe4-Gly5-Ser6-Pro7-Val8-), has been isolated. The structure of cyclopurpuracin (1) was determined by de novo sequencing based on MS/MS spectra and 1D and 2D NMR techniques (1H, 13C, HSQC, HMBC, COSY and ROESY).
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