It appears an unreleased track (it's not in Shippuden Original Soundtrack 1, 2, or 3). There's an unofficial imperfect spliced version though, titled "Six paths of pain / Given Judgment".
This also plays in Shippuden episode 79 (starting at 13:56), when Hidan stabs Asuma.
This also plays in Shippuden episode 117 (starting at 11:42), when ...
I believe it's an unreleased track that's commonly known as "Minato Saves Kushina" amongst fans. This one actually seems to come up here rather often! :P
There are some unofficial versions of the song floating around on YouTube, for example, here.