1709
Serotonin was depleted beginning on postnatal day 26 with parachlorophenylalanine ( PCPA 100 mg / kg , every other day ) ; controls received saline .
 Chemical: Serotonin; Chemical: parachlorophenylalanine; Chemical: PCPA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: Serotonin; Chemical: parachlorophenylalanine; Chemical: PCPA