Question: About transform expression to form of ‘a+b*I’

I want to convert the following expression to form of ‘a+bi’,unfortunately,it can't be successful,Can anyone help me?

 

2*omega^2*B[1]*Zeta*omega[0] - omega^3*B[1]*I + omega*B[1]*omega[0]^2*I - 2*I*B[0]*Zeta*omega*omega[0] - B[0]*omega^2 + B[0]*omega[0]^2

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