Ninhydrin reaction mechanism
<div style="display:inline-block;padding:0 3px;background-color:#BDC"><a href="//commons.wikimedia.org/wiki/File:%E8%8C%9A%E4%B8%89%E9%85%AE%E5%8F%8D%E5%BA%94%E8%BF%87%E7%A8%8B.png" title="File:茚三酮反应过程.png"><b>Original: </b></a></div> <div style="display:inline-block;padding:3px 0;"><a href="https://zh.wikipedia.org/wiki/User:Puppy8800" class="extiw" title="zh:User:Puppy8800">Puppy8800</a></div> <div style="display:inline-block;padding:0 3px;background-color:#CCF">Vector: </div> <div style="display:inline-block;"><a href="https://zh.wikipedia.org/wiki/User:Puppy8800" class="extiw" title="zh:User:Puppy8800">Puppy8800</a></div>
Own work based on: <a href="//commons.wikimedia.org/wiki/File:%E8%8C%9A%E4%B8%89%E9%85%AE%E5%8F%8D%E5%BA%94%E8%BF%87%E7%A8%8B.png" title="File:茚三酮反应过程.png">茚三酮反应过程.png</a>