3912
The synthetic H2S donors reviewed include , GYY4137 ; cysteine analogs ; S - propyl cysteine , S - allyl cysteine , S - propargyl cysteine , and N - acetyl cysteine .
 Chemical: H2S; Chemical: GYY4137; Chemical: cysteine; Chemical: S - propyl cysteine; Chemical: S - allyl cysteine; Chemical: S - propargyl cysteine; Chemical: N - acetyl cysteine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: H2S; Chemical: GYY4137; Chemical: cysteine; Chemical: S - propyl cysteine; Chemical: S - allyl cysteine; Chemical: S - propargyl cysteine; Chemical: N - acetyl cysteine