gcu-plugin software package provides GNOME chemistry utils (browser plugin), you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gcu-plugin
gcu-plugin is installed in your system.
Make ensure the gcu-plugin package were installed using the commands given below,
$ sudo dpkg-query -l | grep gcu-plugin *
You will get with gcu-plugin package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Science |
| Package | gcu-plugin |
| Version | 0.14.10-2 |
| Description | GNOME chemistry utils (browser plugin) |
| Sub Section | Science |