I see it as a Bm6. The intervals are 1,5,6,b3. That open string is a #5 , you need to fret the 1 fret for it to be a 6. For it to be a 13th, you would need at least a b7 or 9 in there too.
Check out Bm6 here.
http://www.looknohands.com/chordhous.../index_rb.html
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