/usr/share/RDKit/Contrib/mmpa/data/sample_cansmirks.txt is in rdkit-data 201603.5-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | [*:1]c1ccc([*:2])o1>>[*:1]c1ccc([*:2])cc1 s1
[*:1]c1ccc([*:2])o1>>[*:1]c1ccc([*:2])cc1 s2
[*:1]c1ccc([*:2])o1>>[*:1]c1ccc([*:2])cc1 s3
|