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Though the phosphoryloxymethylene carbamates ( 3 , 4 , and 5 ) and alpha - aminoacyloxymethylene carbamates ( 22 , 23 , and 26 ) were found unstable at neutral pH values , fumaric acid derived acyloxymethylene carbamates ( 2 , 28 , and 31 ) were highly stable under both acidic and neutral conditions .
 Chemical: phosphoryloxymethylene carbamates; Chemical: alpha - aminoacyloxymethylene carbamates; Chemical: fumaric acid; Chemical: acyloxymethylene carbamates
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: phosphoryloxymethylene carbamates; Chemical: alpha - aminoacyloxymethylene carbamates; Chemical: fumaric acid; Chemical: acyloxymethylene carbamates