25487
While SAR within the HTS series was very shallow and unable to be optimized , grafting the phenethyl ether linkage onto the ML129 / ML172 cores led to the first sub - micromolar M5 PAM , ML326 ( VU0467903 ) , ( human and rat M5 EC50s of 409nM and 500nM , respectively ) with excellent mAChR selectivity ( M1 - M4 EC50s > 30 mu M ) and a robust 20 - fold leftward shift of the ACh CRC .
 Chemical: phenethyl ether; Chemical: ML129; Chemical: ML172; Chemical: ML326; Chemical: VU0467903; Chemical: ACh
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: phenethyl ether; Chemical: ML129; Chemical: ML172; Chemical: ML326; Chemical: VU0467903; Chemical: ACh