1041
The results showed that the extract inhibited the contraction induced by a submaximal dose of acetylcholine ( 2 . 04 x 10 ( - 4 ) mg mL ( - 1 ) ) , oxytocin ( 1 . 54 x 10 ( - 4 ) mg mL ( - 1 ) ) and prostaglandin E2 ( PGE2 ) ( 6 . 00 x 10 ( - 4 ) mg mL ( - 1 ) ) .
 Chemical: acetylcholine; Chemical: oxytocin; Chemical: prostaglandin E2; Chemical: PGE2
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: acetylcholine; Chemical: oxytocin; Chemical: prostaglandin E2; Chemical: PGE2