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 _    _    _    _   __    __   __   __    ______  
| |  | || | || | || \ \\ / //  \ \\/ //  /_   _// 
| |/\| || | || | ||  \ \/ //    \ ` //     | ||   
|  /\  || | \\_/ ||   \  //      | ||     _| ||   
|_// \_||  \____//     \//       |_||    /__//    
`-`   `-`   `---`       `        `-`'    `--`

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發送短信 : Rotational isomerism in 3,4-dimethyl-3,4-dinitrohexane