23755
Clinical characteristics and CY and HCY concentration data were collected for all patients , and ABCB1 , ABCC2 , GSTA1 , GSTM1 , GSTP1 , GSTT1 , CYP2B6 , CYP2C19 , and CYP3A5 genotyping was performed .
 Chemical: HCY
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: HCY