16088
Free coumaroyl hexose ( isomer 1 and 2 ) , dihydroxybenzoic acid , caffeoyl glucose , dihydroferulic acid 4 - O - beta - d - glucuronide , methoxyquercetin 3 - O - galactoside , scopoletin , myricetin and quercetin , together with other 23 phase - I and phase - II metabolites , including various isomers , could be tentatively identified in the urine .
 coumaroyl hexose, dihydroxybenzoic acid, caffeoyl glucose, dihydroferulic acid 4 - O - beta - d - glucuronide, methoxyquercetin 3 - O - galactoside, scopoletin, myricetin, quercetin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 coumaroyl hexose, dihydroxybenzoic acid, caffeoyl glucose, dihydroferulic acid 4 - O - beta - d - glucuronide, methoxyquercetin 3 - O - galactoside, scopoletin, myricetin, quercetin