In this task, you are given a sentence. You are expected to recognize the name of any form of chemical substances. Although there might be several correct answers, you need to write one of them.

[Q]: The increased number of Leydig cells by di(2-ethylhexyl) phthalate comes from the differentiation of stem cells into Leydig cell lineage in the adult rat testis.
[A]: di(2-ethylhexyl) phthalate


[Q]: Inhibitory effects of lysine analogues on t-PA induced whole blood clot lysis.
[A]: lysine


[Q]: Synthesis of quinoline derivatives: discovery of a potent and selective phosphodiesterase 5 inhibitor for the treatment of Alzheimer's disease.
[A]:
quinoline