6850
Even so , BSO pre - treatment abolished NAC protective effects against alpha - MeDA neurotoxicity , which were , at least partially , due to GSH de novo synthesis .
 Chemical: BSO; Chemical: NAC; Chemical: alpha - MeDA; Chemical: GSH
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: BSO, NAC, alpha - MeDA, GSH 
Answer:
 Chemical: BSO; Chemical: NAC; Chemical: alpha - MeDA; Chemical: GSH