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: Estradiol replacement enhances cocaine-stimulated locomotion in female C57BL/6 mice through estrogen receptor alpha.

A: estrogen
****
Q: PPARgamma controls CD1d expression by turning on retinoic acid synthesis in developing human dendritic cells.

A: retinoic acid
****
Q: Phosphorylation and up-regulation of diacylglycerol kinase gamma via its interaction with protein kinase C gamma.

A:
diacylglycerol
****
