How to convert one space group to another with same Z value

I have a str. with space group C2/c with Z=2 and Z'=8 and known lattice parameters and i want to convert its space group to P21/n without any change in Z value. Can I do this using MS-7.0?

Can I predict polymorphs of a str. under space group P21/n using MS-7.0 or Is P21/n space group is enlisted in MS under spacegroup tab under prediction task?

I think P21/n has no mention in MS. It is same as P21/c.

Regards

janhvi