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.

Ex Input:
Two new C-15 enolic acyl phragmalin-type limonoids from Chukrasia tabularis var. velutina.

Ex Output:
limonoids


Ex Input:
DNA topoisomerase IIalpha (TOP2A) inhibitors up-regulate fatty acid synthase gene expression in SK-Br3 breast cancer cells: in vitro evidence for a 'functional amplicon' involving FAS, Her-2/neu and TOP2A genes.

Ex Output:
fatty acid


Ex Input:
Angiotensin AT1 receptor antagonist losartan and the defence reaction in the anaesthetised rat. Effect on the carotid chemoreflex.

Ex Output:

losartan