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.

[EX Q]: Oncolytic activity and mechanism of action of a novel L-cysteine derivative, L-cysteine, ethyl ester, S-(N-methylcarbamate) monohydrochloride.
[EX A]: L-cysteine

[EX Q]: Synergistic enhancement of cancer therapy using a combination of heat shock protein targeted HPMA copolymer-drug conjugates and gold nanorod induced hyperthermia.
[EX A]: HPMA

[EX Q]: Binding of antipsychotic drugs at alpha 1A- and alpha 1B-adrenoceptors: risperidone is selective for the alpha 1B-adrenoceptors.
[EX A]:
risperidone