27800
The novel recreational drug 3 , 4 - methylenedioxypyrovalerone ( MDPV ) is a potent psychomotor stimulant : Self - administration and locomotor activity in rats .
 Chemical: 3 , 4 - methylenedioxypyrovalerone; Chemical: MDPV
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: 3 , 4 - methylenedioxypyrovalerone; Chemical: MDPV