Chiral duals of non-chiral SUSY gauge theories

We study N = 1 SUSY gauge theories in four dimensions with gauge group Spin(7) and Nf flavors of quarks in the spinorial representation. We find that in the range 6 < Nf < 15, this theory has a long distance description in terms of an SU(Nf - 4) gauge theory with a symmetric tensor and Nf antifundamentals. As a spin-off, we obtain by deforming along a flat direction a dual description of the theories based on the exceptional gauge group G2 with Nf fundamental flavors of quarks.