Southeast Asian J Trop Med Public Health. 2010 Mar;41(2):482-9.
Anti-proliferative and antioxidative activities of Thai noni/Yor (Morinda citrifolia Linn.) leaf extract.
Thani W, Vallisuta O, Siripong P, Ruangwises N.

Noni leaf extracts prevented the in vitro growth of multiple human cancer cells, including KB (human epidermoid carcinoma), HeLa (human cervical carcinoma), MCF-7 (human breast carcinoma) and HepG2 (human hepatocellular carcinoma) cell lines. Rutin and scopoletin, compounds found in noni, had modest anti-proliferative effects on the cancer cells.  Damnacanthal, another compound in noni, exhibited potent cytotoxicity against all the cancer cell lines. (view original abstract at https://www.ncbi.nlm.nih.gov/pubmed/20578533).