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Lamiaceae - syn.Leonurus heterophyllus Sweet; Leonurus artemisia (Loureiro) S. Y. Hu;
Chinese Motherwort, 益母草 yi mu cao

Annual or bienniel herb, 30-120cm high, native to East and Southeast Asia; lower stem leaf blades ovate, 3-palmatipartite; floral leaves linear to linear-lanceolate; flowers sessile, calyx tubular-campanulate (6-8 mm), corolla white or reddish to purplish red. http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=210000972

„It is one of the 50 fundamental herbs used in traditional Chinese medicine, where it is called yìmǔcǎo (Chinese: 益母草), literally „beneficial herb for mothers“.“ http://en.wikipedia.org/wiki/Leonurus_japonicus

The plant has been used for centuries in Korea and is said to be the most important crude drug in gynecological medicine. It is officially listed in the Korean Pharmacopoeia. Aerial parts contain labdane-type diterpenes (leosibirinone, 3α-Acetoxy-15-O-methylleopersin C), and flavonoid(-glycoside)s (nicotiflorin, rutin, genkwanin, tiliroside, cosmosiin, isoquercitrin).
[Labdane diterpenes and flavonoids from Leonurus japonicus. Seo, H. K., Kim, J. S., & Kang, S. S., Helvetica Chimica Acta, Vol.93(10), 2010, 2045-2051]
http://www.ncshm.re.kr/erp/erpmenus/research_result/uploadfiles/%EC%9D%B5%EB%AA%A8%EC%B4%88-%EA%B0%95%EC%82%BC%EC%8B%9D.pdf

„Yimucao oil was mainly made up of diterpenes (32.77%) and sesquiterpenes (45.37%), with phytone (19.02%), phytol (13.75%), caryophyllene oxide (11.49%) and β-caryophyllene (9.89%) being the most significant constituents. Other sesquiterpenes that were present in appreciable amounts were spathulenol (5.31%), α-caryophyllene (3.38%) and isocaryophyllene (3.00%).“
[Chemical composition and antibacterial activity of essential oils from different parts of Leonurus japonicus Houtt. Xiong, L., Peng, C., Zhou, Q. M., Wan, F., Xie, X. F., Guo, L., … & Dai, O., Molecules, Vol.18(1), 2013, 963-973]