M. C. s Tan, G. G. Oyong, C.-C. Shen, and C. Y. Ragasa, “CYTOTOXIC LABDANE DITERPENOIDS FROM ANDROGRAPHIS PANICULATA (BURM.F.) NEES”, Asian J Pharm Clin Res, vol. 10, no. 12, pp. 99–104, Dec. 2017.