18732
Seedlings were treated with NO donor ( 0 . 25 mM sodium nitroprusside , SNP ) and As ( 0 . 25 and 0 . 5 mM Na2HAsO4 . 7H2O ) separately and / or in combination and grown for 72 h .
 Chemical: NO; Chemical: sodium nitroprusside; Chemical: SNP; Chemical: As; Chemical: Na2HAsO4 . 7H2O
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: NO; Chemical: sodium nitroprusside; Chemical: SNP; Chemical: As; Chemical: Na2HAsO4 . 7H2O