Limonoids are phytochemicals, abundant in citrus fruit and other plants of the families Rutaceae and Meliaceae. Currently, limonoids are under investigation for possible effects in humans, although no proof of effect exists to date. Certain limonoids are insecticides such as azadirachtin from the neem tree.
Chemically, the limonoids consist of variations of the furanolactone core structure. The prototypical structure consists of four six-membered rings and a furan ring. Limonoids are classed as tetranortriterpenes.
- Amit Roy and Shailendra Saraf (2006). "Limonoids: Overview of Significant Bioactive Triterpenes Distributed in Plants Kingdom". Biol. Pharm. Bull. 29 (2): 191–201. doi:10.1248/bpb.29.191. PMID 16462017.