In which table we can get the request number corresponding to a PSA request number?

Hi experts,

I have a scenario.

I want to get the request numbers corresponding to a PSA request number when request is activated.

In RSA1 view, we can see the request no. in DSO level just next to the column ,"PSA request number when request is activated",

Now my question is ,in which table we can find the request numbers by giving the i/p parameter as the PSA request numbers, (e.g.-ODSR_************)

Please help.