How do I know if a UC class is compatible at my UC school?

I have to take a certain class for the second half of Summer at UCLA but I do not know for sure if it is compatible with the class I need from UC Davis. I have tried assist.org but I guess its only for transfer students from a community college to a 4 year university. Any suggestions or direction I should take? Any help would be much appreciated. Thank you.

Call and ask UCD admissions. Assist.org does not allow to select UCLA to UCD coursrs as an optiipn?