Two New C -Diterpenoid Alkaloids from Delphinium shawurense.

Shawurenine C (1a) and D (1b), a new pair of regioisomeric C -diterpenoid alkaloids, and five known C -diterpenoid alkaloids (2-6) were isolated from the aerial part of Delphinium shawurense W. T. Wang.

Anti-Diabetic Effects and Molecular Mechanisms of Amide Alkaloids from Piper longum Based on Network Pharmacology Integrated with Cellular Assays.

Piper longum is a well-known spice and traditional medicine. It was revealed to possess anti-diabetic activity, but few information about its active component and underlying mechanism could be available. In this study, retrofractamides A (1) and C (2) isolated from P.

-Alkylamides from L. and their stimulative effects on the melanin content and tyrosinase activity in B16 melanoma cells.

L., known as long pepper, is an edible and medicinal plant used as spice and for the treatment of stomach disease and analgesia in traditional Chinese medicine. -Alkylamides are the major secondary metabolites in this plant.