1、安装openbabel

apt install openbabel

2、下载openbabel-cli包

npm install openbabel-cli --save

3、编码

const openbabel = require('openbabel-cli');

openbabel.convert('CC1=C2C=CC(=C(C2=C[N+]3=C1C4=CC5=C(C=C4CC3)OCO5)OC)OC.[Cl-]',{outputFormat: "svg"}).then(canonical => {
        res.send(canonical);
    })