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We conjugated either ester or amide - linker modified MTX to dendrimer scaffolds with or without folic acid ( FA ) .
 Chemical: ester; Chemical: amide; Chemical: MTX; Chemical: folic acid
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: ester; Chemical: amide; Chemical: MTX; Chemical: folic acid