14995
Although the basal nociceptive responses didn ' t require the involvement of PTPs , the mechanical allodynia evoked by intrathecal injection of NMDA was greatly attenuated by orthovanadate and Bpv ( phen ) , suggesting that PTPs activity , once stimulated by NMDA receptors , became essential for spinal sensitization .
 Chemical: NMDA; Chemical: orthovanadate; Chemical: Bpv ( phen ); Chemical: NMDA
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: NMDA, orthovanadate, Bpv ( phen ), NMDA 
Answer:
 Chemical: NMDA; Chemical: orthovanadate; Chemical: Bpv ( phen ); Chemical: NMDA