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: Binding of (-)-[3H]-CGP12177 at two sites in recombinant human beta 1-adrenoceptors and interaction with beta-blockers.

A: (-)-[3H]-CGP12177
****
Q: Nocapyrones H-J, 3,6-Disubstituted α-Pyrones from the Marine Actinomycete Nocardiopsis sp. KMF-001.

A: 3,6-Disubstituted α-Pyrones
****
Q: Nicotine-induced contraction in the rat coronary artery: possible involvement of the endothelium, reactive oxygen species and COX-1 metabolites.

A:
oxygen
****