15429
We describe herein the discovery of a series of M ( 5 ) - preferring orthosteric antagonists based on the scaffold of 1 , 2 , 5 , 6 - tetrahydropyridine - 3 - carboxylic acid .
 Chemical: 1 , 2 , 5 , 6 - tetrahydropyridine - 3 - carboxylic acid
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: 1 , 2 , 5 , 6 - tetrahydropyridine - 3 - carboxylic acid