7482
Estrogen receptor - alpha ( ER alpha ) expressed by hypothalamic proopiomelanocortin and steroidogenic factor - 1 neurons largely mediates the antiobesity effects of estrogens in females .
 Chemical: Estrogen; Chemical: estrogens
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: Estrogen; Chemical: estrogens