9703
Novel limonene and citral based 2 , 5 - disubstituted - 1 , 3 , 4 - oxadiazoles : a natural product coupled approach to semicarbazones for antiepileptic activity .
 Chemical: limonene; Chemical: citral; Chemical: 2 , 5 - disubstituted - 1 , 3 , 4 - oxadiazoles; Chemical: semicarbazones
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: limonene; Chemical: citral; Chemical: 2 , 5 - disubstituted - 1 , 3 , 4 - oxadiazoles; Chemical: semicarbazones