instruction:
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.
question:
Boron-based inhibitors of acyl protein thioesterases 1 and 2.
answer:
acyl


question:
Arachidonic acid and nonsteroidal anti-inflammatory drugs induce conformational changes in the human prostaglandin endoperoxide H2 synthase-2 (cyclooxygenase-2).
answer:
prostaglandin endoperoxide H2


question:
Ergovaline binding and activation of D2 dopamine receptors in GH4ZR7 cells.
answer:

dopamine


