18708
The aim of the present study was to evaluate the interactions of two classes of EDCs , 17 beta - estradiol ( E2 ) and ketoconazole ( KTC ) , on endocrine function in male goldfish ( Carassius auratus ) , including vitellogenesis , metabolic capability and serum steroid synthesis .
 Chemical: 17 beta - estradiol; Chemical: E2; Chemical: ketoconazole; Chemical: KTC
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: 17 beta - estradiol, E2, ketoconazole, KTC 
Answer:
 Chemical: 17 beta - estradiol; Chemical: E2; Chemical: ketoconazole; Chemical: KTC