Cephalocyclidin A is a pentacyclic alkaloid and can be isolated from Cephalotaxus harringtonia var.nana[1].
References
[1] Kobayashi J, et al. Cephalocyclidin A, a novel pentacyclic alkaloid from Cephalotaxus harringtonia var. nana. J Org Chem. 2002 Apr 5;67(7):2283-6. DOI:10.1021/jo016327f