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:
New oral anticoagulants: comparative pharmacology with vitamin K antagonists.
answer:
vitamin K


question:
Anti-inflammatory trends of 1, 3-diphenyl-2-propen-1-one derivatives.
answer:
1, 3-diphenyl-2-propen-1-one


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

diarylheptanoids