Competitive inhibitor of cGMP-dependent protein kinase (PKG); analog of a substrate peptide corresponding to a phosphorylation site of histone H2B. Competes with synthetic substrates (Ki = 86 mM) but does not inhibit phosphorylation of intact histones by PKG. Inhibits phosphorylation of intact histones by PKA.

Bryonolic acid is a triterpenoid found in the Cucurbitaceae family of plants. Bryonolic acid has anti-inflammatory and antioxidant activities. It has been found to exhibit antineoplastic activity.

Ascomycin(Immunomycin, FR-900520, FK520) 是他克莫司 (FK506) 的乙基类似物，具有很强的免疫抑制特性。