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.

Input: Consider Input: Ligand binding specificities of the eight types and subtypes of the mouse prostanoid receptors expressed in Chinese hamster ovary cells.

Output: prostanoid


Input: Consider Input: In vivo and in vitro anti-inflammatory potential of pentahydroxy-pregn-14-ol, 20-one-β-d-thevetopyranoside in rats.

Output: pentahydroxy-pregn-14-ol, 20-one-β-d-thevetopyranoside


Input: Consider Input: The role of long chain omega-3 polyunsaturated fatty acids in reducing lipid peroxidation among elderly patients with mild cognitive impairment: a case-control study.


Output: omega-3 polyunsaturated fatty acids