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:
Phospholipase Cgamma1 negatively regulates growth hormone signalling by forming a ternary complex with Jak2 and protein tyrosine phosphatase-1B.
answer:
tyrosine


question:
The (R)-omeprazole hydroxylation index reflects CYP2C19 activity in healthy Japanese volunteers.
answer:
(R)-omeprazole


question:
Identification and characterization of a novel flavin-containing spermine oxidase of mammalian cell origin.
answer:

spermine