TASK DEFINITION: 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.
PROBLEM: Nocapyrones H-J, 3,6-Disubstituted α-Pyrones from the Marine Actinomycete Nocardiopsis sp. KMF-001.

SOLUTION: 3,6-Disubstituted α-Pyrones

PROBLEM: PPARgamma controls CD1d expression by turning on retinoic acid synthesis in developing human dendritic cells.

SOLUTION: retinoic acid

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

SOLUTION:
gamma-Aminolevulinate