^Yamauchi, Tatsuo; Abe, Fumiko; Chen, Rong-fu; Nonaka, Gen-Ichiro; Santisuk, Thawatchai; Padolina, William G. (1990). "Alkaloids from the leaves of Alstonia scholaris in Taiwan, Thailand, Indonesia and the Philippines". Phytochemistry. 29 (11): 3547–3552.
Bibcode:
1990PChem..29.3547Y.
doi:
10.1016/0031-9422(90)85273-I.
ISSN0031-9422.