How can I find filter coefficients?

Hello community,

I've designed a butterworth filter:

h = fdesign.bandstop('fp1,fst1,fst2,fp2,ap1,ast,ap2', Fpass1, Fstop1, ...
    Fstop2, Fpass2, Apass1, Astop, Apass2, Fs);

Hd = design(h, 'butter', ...
    'MatchExactly', 'stopband', ...
    'SOSScaleNorm', 'Linf');

This filter has a phase shift so I need to shift phase. As I know, I have to apply filtfilt, but for this I have to know filter coefficients. How can I get them?

Thanks in advance.

Andrew