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.

The Hsp90-specific inhibitor geldanamycin selectively disrupts kinase-mediated signaling events of T-lymphocyte activation.
geldanamycin

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

Effects of silver nanoparticles on the liver and hepatocytes in vitro.

silver