detect scientific linux os

Hi, I’d like to know the variable for scientific linux for conditional package requires, eg:

%if 0%{?fedora} || 0%{?rhel_version} || 0%{?centos_version}
BuildRequires: mono-core
%endif

The variable for scientific linux is not described in the wiki page, in the distribution array:
https://en.opensuse.org/openSUSE:Build_Service_cross_distribution_howto#Detect_a_distribution_flavor_for_special_code

This is not something that is defined by the OBS but by the distro. As far as I can see from their rpm configuration they have this:

cat /etc/rpm/macros.dist

dist macros.

%rhel 7
%dist .el7
%el7 1