Flavonoids from (Taroda) J.S. Mill (cordiaceae) and the evaluation of spasmolytic activity of its crude ethanolic extract.

Pharmacological studies show spasmolytic activity for various species of . Thus, based on the taxonomy criteria, the aim of this study was to contribute to chemical and biological knowledge, especially regarding the evaluation of spasmolytic activity of the ethanolic extract from leaves (VD-EtOH) on rat aorta and trachea, guinea-pig ileum and rat uterus. Were used High and Medium Performance Liquid Chromatography. Wistar rats and guinea-pigs were used for pharmacological assays. All experimental protocols were approved by Animal Ethics Committee of UFPB (126/2017). Two chalcones (pinostrobin chalcone and gymnogrammene), five flavanones (pinocembrin, isosakuranetin, pinostrobin, sakuranetin 4'-methyl ether, naringenin) and a flavonoid glycosilated (astragalin) were identified based on data of H and C Nuclear Magnetic Resonance. This study also showed that VD-EtOH has a non-selective spasmolytic activity, presenting greater relaxing potency in rat uterus, suggesting that flavonoids isolated from VD-EtOH may be responsible for spasmolytic activity of this extract.