Lucialdehyde B is a tetracyclic triterpenoid that is lanosta-8,24-dien-26-al substituted by oxo groups at positions 3 and 7. Isolated from Ganoderma lucidum and Ganoderma pfeifferi, it exhibits antiviral and cytotoxic activities. It has a role as a metabolite, an antineoplastic agent and an anti-HSV agent. It is a steroid aldehyde, a 3-oxo-5alpha-steroid, a tetracyclic triterpenoid, a cyclic terpene ketone and a 7-oxo steroid. It derives from a hydride of a lanostane. Lucialdehyde B exhibits potent inhibitory activity against herpes simplex virus. It shows cytotoxic effects on Lewis lung carcinoma (LLC), T-47D, Sarcoma 180, and Meth-A tumor cell lines.

Ganoderenic acid D is most cytotoxic with IC50 values of 0.14 ± 0.01, 0.18 ± 0.02 and 0.26 ± 0.03 mg/mL in Hep G2, Hela and Caco-2 cells, respectively.