Amaronol A is an auronol, that can be isolated from the bark of Pseudolarix amabilis.

(-)-Borneol has a highly efficacious positive modulating action at GABA receptor with an EC50 of 237 μM.

KL-50 is a selective toxin toward tumors that lack the DNA repair protein O6-methylguanine-DNA-methyltransferase (MGMT), which reverses the formation of O6-alkylguanine lesions. KL-50 activates DNA damage response pathways and cycle arrest in MGMT-cells, independent of mismatch repair (MMR). KL-50 is promising for research of brain tumors that lack the DNA repair protein MGMT.