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:
The preventive effect of uncarboxylated osteocalcin against free fatty acid-induced endothelial apoptosis through the activation of phosphatidylinositol 3-kinase/Akt signaling pathway: Uncarboxylated osteocalcin and endothelial apoptosis.
answer:
phosphatidylinositol


question:
Glutamate stimulates glutamate receptor interacting protein 1 degradation by ubiquitin-proteasome system to regulate surface expression of GluR2.
answer:
glutamate


question:
Use of (Gyro) Gy and spermine synthase transgenic mice to study functions of spermine.
answer:

spermine