6995
The synergistic activity was observed at ceftazidime plus either apigenin or naringenin combinations with FIC indixes between < 0 . 01 and < 0 . 27 against these strains , whereas ceftazidime plus clavulanic acid or quercetin did not exhibit synergy .
 Chemical: ceftazidime; Chemical: apigenin; Chemical: naringenin; Chemical: ceftazidime; Chemical: clavulanic acid; Chemical: quercetin
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: ceftazidime; Chemical: apigenin; Chemical: naringenin; Chemical: ceftazidime; Chemical: clavulanic acid; Chemical: quercetin