28527
beta - estradiol 17 - valerate ( EV ) is a synthetic estrogen widely used in combination with other steroid hormones in hormone replacement therapy drugs and is detected in natural waters .
 Chemical: beta - estradiol 17 - valerate; Chemical: estrogen; Chemical: steroid hormones
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: beta - estradiol 17 - valerate; Chemical: estrogen; Chemical: steroid hormones