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: Efficient induction of apoptosis in HeLa cells by a novel cationic porphycene photosensitizer.

Output: porphycene

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

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

Input: Consider Input: Binding and GTPgammaS autoradiographic analysis of preproorphanin precursor peptide products at the ORL1 and opioid receptors.
Output: GTPgammaS