NPC-15437 dihydrochloride 是一种合成原型化合物，属于新型结构类别的蛋白激酶 C（PKC）抑制剂。NPC 15437 可显著抑制 PKC 的酶活性与酯类激动剂结合，IC₅₀ 分别约为 19 μM 与 23 μM；在浓度高达 300 μM 时，不影响 cAMP 依赖性或 Ca²⁺/钙调蛋白依赖性激酶，显示出对 PKC 的高度选择性，是解析 PKC 介导细胞信号通路的重要工具化合物。

GNN14490, a substrate for human pancreatic lipase, is utilized to create monomolecular films for enzyme assay studies.

7-oxo Staurosporine is an antibiotic originally isolated from S. platensis with diverse biological activites. It inhibits PKC, PKA, phosphorylase kinase, EGFR, and c-Src in vitro (IC50s = 9, 26, 5, 200, and 800 nM, respectively). 7-oxo Staurosporine induces cell cycle arrest in the G2/M phase in human leukemia K562 cells with a minimal effective dose (MED) of 30 ng/ml. It is cytotoxic to P388 mouse leukemia cells that are resistant and susceptible to doxorubicin . 7-oxo Staurosporine inhibits growth of the mycelial, but not yeast form of C. albicans, C. krusei, C. tropicalis, and C. lusitaniae (MICs = 3.1-25 μg/ml). It increases sphingomyelin synthesis in CHO-K1 cells when used at a concentration of 50 nM.

Cercosporin is produced by a plant pathogen, Cercosporakikuchii, and the elsinochromes. Cercosporin is a potent photosensitizer with a short activation wavelength. Cercosporin contains the perylene quinone structural features necessary for PKC activity (I

N-Desmethyltamoxifen, the principal metabolite of tamoxifen in humans, serves as an efficacious modulator of ceramide metabolism within human AML cells by inhibiting ceramide glycosylation, hydrolysis, and sphingosine phosphorylation. Although it demonstrates weak antiestrogenic properties, it acts as a protein kinase C (PKC) inhibitor with a potency ten times greater than that of tamoxifen.

Cycloheterophyllin has an antioxidant effect, it is a photoprotective agent that inhibits ultraviolet A (UVA)-induced oxidative stress and damage, and could be used in the research on and prevention of skin photoaging.