A novel alkaloid (1,8,8-trimethyl-5,8-dihydro-1H-pyrano[3,4-b]pyridine-4,6-dione) was isolated from the chloroformic traction obtained from the total alcoholic extract of the aerial parts of Stapelia hirsuta L. In addition, apigenin, luteolin and \beta-sitosterol-3-O-\beta-D- glucopyranoside were also isolated.
SHABANA, MARWAN; GONAID, MARIAM; SALAMA, MAHA MAHMOUD; and ABDEL-SATTAR, ESSAM (2006) "A Novel Alkaloid from Stapelia hirsuta," Turkish Journal of Chemistry: Vol. 30: No. 1, Article 10. Available at: https://journals.tubitak.gov.tr/chem/vol30/iss1/10