16046
It is hypothesized that analogs of both ( + ) - and ( - ) - huperzine A with an improved ability to interact with NMDA receptors together with reduced AChE inhibition will exhibit more effective neuroprotection against nerve agents .
 Chemical: ( + ) - and ( - ) - huperzine A; 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: ( + ) - and ( - ) - huperzine A, NMDA 
Answer:
 Chemical: ( + ) - and ( - ) - huperzine A; Chemical: NMDA