18095
Specifically , increased succinic acid semialdehyde , a metabolism product of GABA , was observed in hippocampus .
 Chemical: succinic acid semialdehyde; Chemical: GABA
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: succinic acid semialdehyde; Chemical: GABA