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Nevertheless , the nitrogen of the imidazole ring of free l - histidine formed a variety of adducts upon reaction with CBDP , including the o - hydroxybenzyl adduct , suggesting that histidine - CBDP adducts may form on other proteins .
 Chemical: nitrogen; Chemical: imidazole; Chemical: l - histidine; Chemical: CBDP; Chemical: o - hydroxybenzyl; Chemical: histidine; Chemical: CBDP
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: nitrogen; Chemical: imidazole; Chemical: l - histidine; Chemical: CBDP; Chemical: o - hydroxybenzyl; Chemical: histidine; Chemical: CBDP