Indole alkaloids from Alstonia macrophylla
ZHANG Jin-ping, YAN Hui-jiao, WANG Ya-lan, WANG Zhi-wei , WANG Xiao-jing,
NATURAL PRODUCT RESEARCH AND DEVELOPMENT . 2020, (4): 622 -626 .  DOI: 10.16333/j.1001-6880.2020.4.011