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: A novel mutation of the erythroid-specific gamma-Aminolevulinate synthase gene in a patient with non-inherited pyridoxine-responsive sideroblastic anemia.

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

A: GABA
****
Q: The presence of D-fagomine in the human diet from buckwheat-based foodstuffs.

A:
D-fagomine
****