Ishiguro, K., Ohira, Y., and Oku, H. 1998. Antipruritic Dinapthofuran-7,12-dione Derivatives from the Pericarp of Impatiens balsamina. J. Nat. Prod., 61 (9): 1126-1129.
*Unless otherwise noted all references are to Duke, James A. 1992. Handbook of phytochemical constituents of GRAS herbs and other economic plants. Boca Raton, FL. CRC Press.