18037
Here , we provide evidence that the physiological effects observed upon the application of sodium nitroprusside ( SNP ) and H ( 2 ) S can be ascribed to the generation of nitroxyl ( HNO ) , which is a direct product of the reaction between SNP and H ( 2 ) S , not a consequence of released NO subsequently reacting with H ( 2 ) S .
 Chemical: sodium nitroprusside; Chemical: SNP; Chemical: H ( 2 ) S; Chemical: nitroxyl; Chemical: HNO; Chemical: SNP; Chemical: H ( 2 ) S; Chemical: NO; Chemical: H ( 2 ) S
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: sodium nitroprusside; Chemical: SNP; Chemical: H ( 2 ) S; Chemical: nitroxyl; Chemical: HNO; Chemical: SNP; Chemical: H ( 2 ) S; Chemical: NO; Chemical: H ( 2 ) S