line integral

bartadam

I have the following line integral

[tex] \int_{t_{0}}^{t} dt' Y^{\mu}(x(t))\frac{\partial \phi(x(t))}{\partial x^{\mu}}[/tex]

Can I take the partial derivative outside the integral given that [tex]\frac {\partial Y^{\mu}}{\partial x^{\mu}}=0[/tex]?