19631
The new compounds from the patent are defined to be biologically active metabolites , prodrugs , isomers , stereoisomers , solvates , hydrates and pharmaceutically acceptable salts , they are claimed to be useful for treating immunological conditions because of their inhibitory activities on matrix metalloproteinase ( MMP - 13 ) , although no specific MMP - 13 inhibition data or other rationale to explain their biological effects is provided .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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