One of the softwares available for the Synology is Cloudstation that mimics Dropbox functionality but with your own server (in this case your Synology device). For the Cloustation server there are several clients available, and one of them is CloudStation for Linux.
But I run Kubuntu version of Ubuntu with the KDE desktop, and during installation of the CloudStation for Linux/Ubuntu, one of the installation steps by the Cloudstation install program is to run apt-get where Nautilus, Brasero and a lot of other supporting libraries are required to be installed.
But, as I’ve found out, those packages are only needed for file manager integration, not for the functionality of the CloudStation software.
So just answer NO to the request of packages (you may want to keep a copy of the package list for future installation), and let CloudStation install.
On my KDE 4.11.3 it CloudStation works fine, and it has the Status icon on the Systray, without the required Nautilus libraries. Of course there is no Dolphin integration.