發送短信 : Electrospray tandem mass spectrometric investigations of tadalafil and its analogue [4]

 _    _    __   __  __    __   _    _     _____   
| \  / ||  \ \\/ // \ \\ / // | || | ||  |__  //  
|  \/  ||   \ ` //   \ \/ //  | || | ||    / //   
| .  . ||    | ||     \  //   | \\_/ ||   / //__  
|_|\/|_||    |_||      \//     \____//   /_____|| 
`-`  `-`     `-`'       `       `---`    `-----`