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.
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Question: RDH12, a retinol dehydrogenase causing Leber's congenital amaurosis, is also involved in steroid metabolism.

Answer: retinol


Question: Increased Cat3-mediated cationic amino acid transport functionally compensates in Cat1 knockout cell lines.

Answer: amino acid


Question: Encapsulation of Nod1 and Nod2 receptor ligands into poly(lactic acid) nanoparticles potentiates their immune properties.

Answer:
poly(lactic acid)