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Considering that , at date data available dealing with the adverse outcome of Di - ( 2 - ethylhexyl ) - phthalate ( DEHP ) on the reproduction of several species are still contrasting , in this study , the effects induced by DEHP ( 0 . 05 , 0 . 1 , 1 , 10 and 100 nM ) and its active metabolite , phthalic acid ( PA ) ( 0 . 01 , 0 . 1 , 1 and 10 mu M ) , were analyzed in zebrafish , Danio rerio , primary hepatocyte cultures , using target molecules involved in fish reproduction ( vitellogenin - - vtg and estrogen receptors - - ER alpha , beta 1 and beta 2 ) and metabolism ( peroxisome proliferators activated receptors - - PPAR alpha , beta , gamma ) .
 Chemical: Di - ( 2 - ethylhexyl ) - phthalate; Chemical: DEHP; Chemical: DEHP; Chemical: phthalic acid; Chemical: estrogen
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: Di - ( 2 - ethylhexyl ) - phthalate; Chemical: DEHP; Chemical: DEHP; Chemical: phthalic acid; Chemical: estrogen