Jolad, S.D.; Hoffmann, J.J.; Cole, J.R.; Tempesta, M.S.; Bates, R.B. 1980. Cytotoxic agent from Penstemon deustus (Scrophulariaceae): Isolation and stereochemistry of Liriodendrin, a symmetrically substituted furofuranoid lignan diglucoside. Journal of Organic Chemistry. 45(7): 1327-1329.

Jolad, S.D.; Hoffmann, J.J.; Cole, J.R.; Tempesta, M.S.; Bates, R.B. 1980. Cytotoxic agent from Penstemon deustus (Scrophulariaceae): Isolation and stereochemistry of Liriodendrin, a symmetrically substituted furofuranoid lignan diglucoside. Journal of Organic Chemistry. 45(7): 1327-1329.