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.

Potential diagnostic applications of side chain oxysterols analysis in plasma and cerebrospinal fluid.
oxysterols

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

Neuroprotection by propargylamines in Parkinson's disease: suppression of apoptosis and induction of prosurvival genes.

propargylamines

