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Metabolites of norepinephrine [ 3 - methoxy - 4 - hydroxyphenylglycol ( MHPG ) and vanillylmandelic acid ( VMA ) ] and dopamine [ homovanillic acid ( HVA ) ] were measured by high - pressure liquid chromatography with electrochemical detection .
 Chemical: norepinephrine; Chemical: 3 - methoxy - 4 - hydroxyphenylglycol; Chemical: MHPG; Chemical: vanillylmandelic acid; Chemical: VMA; Chemical: dopamine; Chemical: homovanillic acid; Chemical: HVA
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: norepinephrine; Chemical: 3 - methoxy - 4 - hydroxyphenylglycol; Chemical: MHPG; Chemical: vanillylmandelic acid; Chemical: VMA; Chemical: dopamine; Chemical: homovanillic acid; Chemical: HVA