Demethylzeylasteral exhibits strong inhibition towards UDP-glucuronosyltransferase (UGT) 1A6 and 2B7, and the inhibition kinetic parameters (Ki) are calculated to be 0.6 uM and 17.3 uM for UGT1A6 and UGT2B7, respectively. Demethylzeylasteral has antimicrobial, strong immunosuppressive, and antifertility activities; it concentration-dependently and in a partially reversible manner can inhibit the Ca(2+) current in spermatogenic cells with an IC(50) of 8.8 microg/ml, and it also can inhibit significantly the sperm acrosome reaction initiated by progesterone. Demethylzeylasteral is a carbopolycyclic compound with formula C29H36O6, originally isolated from Tripterygium wilfordii. It has a role as an EC 2.4.1.17 (glucuronosyltransferase) inhibitor, an immunosuppressive agent, an anti-inflammatory agent, a nephroprotective agent and a plant metabolite. It is a member of benzenediols, an arenecarbaldehyde, a carbopolycyclic compound, an oxo monocarboxylic acid, a cyclic ketone and an enone.

Triptonide is a diterpene triepoxide that is triptobenzene K in which the acylhydroquinone moiety has undergone oxidation to the corresponding triepoxyketone derivative. It has been isolated from the roots of Tripterygium wilfordii. It has a role as an antineoplastic agent, an immunosuppressive agent and an anti-inflammatory agent. It is a diterpene triepoxide, a cyclic ketone, a butenolide and an organic heteroheptacyclic compound. Triptonide is effective in the treatment of autoimmune diseases and has potent antileukemic and antitumor activities, it possesses anti-inflammatory activity, upregulate the expression of IL-37, and this expression was suppressed by ERK1/2 and p38 MAPK inhibitors.

Quinidine is a cinchona alkaloid consisting of cinchonine with the hydrogen at the 6-position of the quinoline ring substituted by methoxy. It has a role as an alpha-adrenergic antagonist, an antimalarial, an anti-arrhythmia drug, a sodium channel blocker, a muscarinic antagonist, a P450 inhibitor, a potassium channel blocker, an EC 3.6.3.44 (xenobiotic-transporting ATPase) inhibitor, an EC 1.14.13.181 (13-deoxydaunorubicin hydroxylase) inhibitor and a drug allergen. Quinidine, a useful antiarrhythmic compound, is usually contaminated with dihydroquinidine, a compound that itself shows potent antiarrhythmic activity.

1-stearoyl-sn-glycero-3-phosphocholine is a lysophosphatidylcholine 18:0 in which the acyl substituent is located at position 1 and is specified as stearoyl. It has a role as an apoptosis inducer and a mouse metabolite. It is a 1-O-acyl-sn-glycero-3-phosphocholine and a lysophosphatidylcholine 18:0. It is functionally related to an octadecanoic acid.