The betaine of l-proline found in alfalfa, chrysanthemum, and citrus plants.
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In the aerial parts of Leonurus cardiaca, there are ingredients belonging to the group of terpenes, including monoterpenes such as iridoids [8], diterpenes of clerodane [9], furanolabdane, and labdane types [10], triterpenes including ursolic and oleanolic acids [11,12], nitrogen-containing compounds such as leonurine [13] and stachydrine 14], and phenylpropanoids such as lavandulifolioside [6], as well as flavonoids [15], phenolic acids [16], volatile oils [17], sterols [18], and tannins.
The major pharmacologically active constituents of LH extracts are alkaloids, such as stachydrine, leonurine, leonurinineand betonicine.