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.

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

The effect of estramustine derivatives on microtubule assembly in vitro depends on the charge of the substituent.
estramustine

Anti-adipogenic diarylheptanoids from Alnus hirsuta f. sibirica on 3T3-L1 cells.

diarylheptanoids

