Ha ES, Lee EO, Yoon TJ, Kim JH, Park JO, Lim NC, Jung SK, Yoon BS, Kim SH. Methylene chloride fraction of Spatholobi Caulis induces apoptosis via caspase dependent pathway in U937 cells. Biol Pharm Bull. 2004 Sep;27(9):1348–52. doi: 10.1248/bpb.27.1348. PMID: 15340217.