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: Activity-dependent cleavage of brain glutamic acid decarboxylase 65 by calpain.

A: glutamic acid
****
Q: Study of the nematode putative GABA type-A receptor subunits: evidence for modulation by ivermectin.

A: GABA
****
Q: A low toxicity maintenance regime, using eicosapentaenoic acid and readily available drugs, for mantle cell lymphoma and other malignancies with excess cyclin D1 levels.

A:
eicosapentaenoic acid
****