Abstract: Disclosed are novel compounds of Chemical Formula 1, optical isomers of the compounds, and pharmaceutically acceptable salts of the compounds or the optical isomers. The compounds, isomers, and salts exhibit excellent activity as GLP-1 receptor agonists. In particular, they, as GLP-1 receptor agonists, exhibit excellent glucose tolerance, thus having a great potential to be used as therapeutic agents for metabolic diseases. Moreover, they exhibit excellent pharmacological safety for cardiovascular systems.

Abstract: The present invention proposes a scheme for realizing a structure and a technology which can support direct linkage between services in an inter-MEC environment, the services being mounted in different MEC systems, respectively.

Abstract: Disclosed is a method and system for transmitting multimedia contents in a communication network, wherein multimedia data stored in a subscriber's terminal can be automatically uploaded. The method comprises the steps of (a) transmitting a multimedia data transmission command from a terminal multimedia storage server to a terminal through a communication network; and (b) when the terminal receives the multimedia data transmission command, uploading the multimedia data stored in the terminal to the terminal multimedia storage server in response to the multimedia data transmission command.