25084
Several chiral ligands containing ( R , R ) - diaminocyclohexane moieties and pyrrole , furan , or benzene have been synthesized .
 Chemical: ( R , R ) - diaminocyclohexane; Chemical: pyrrole; Chemical: furan; Chemical: benzene
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: ( R , R ) - diaminocyclohexane; Chemical: pyrrole; Chemical: furan; Chemical: benzene