Mutarda nigra (L.) Bernh.

(E/Z)-Sinigrin ((E/Z)-Allyl-glucosinolate; (E/Z)-2-Propenyl-glucosinolate) free base is an orally active aliphatic thioglucoside anti-leukemia compound. Allyl isothiocyanate, produced by the hydrolysis of (E/Z)-sinigrin free base by myrosinase, has an IC₅₀ of 2.71 μM against HL60 leukemia cells. The hydrolysis products of (E/Z)-sinigrin free base can further activate apoptosis pathways, inhibit NF-κB and MAPK signaling pathways, and induce phase II metabolic enzyme activity, thus exhibiting anti-cancer, anti-inflammatory, antibacterial, antioxidant, and wound healing activities. (E/Z)-Sinigrin free base can be used in research on cancer, inflammation-related diseases (such as atherosclerosis), and infectious diseases. (E/Z)-Sinigrin free base can be naturally extracted from the seeds of Brassica nigra, Brassica juncea, and other Brassicaceae plants such as broccoli and Brussels sprouts. Methyl pechueloate is a guaiane-type sesquiterpene ester compound and a potential precursor of xerantholide. It is useful in the structural elucidation and biosynthetic pathway studies of sesquiterpenoids. Methyl pechueloate can be naturally extracted from the aerial parts of Pechuel-Loeschea leibnitziae (Kuntze) O. Hoffm.

Methyl 3,4,5-trimethoxycinnamate (Compound III) is a natural compound with hydroxyl radical-scavenging effects.