Components in the circuit based on admittance (in complex form)
Is it possible to know what components are in the circuit based on the
admittance?

Unfortunately not because a single spectral point admittance value tells you nothing about what that admittance changes to at other frequencies AND you need a full spectrum of admittance (or impedance) values to make that determination. Even then, it won't tell you what the exact &quot;black-box&quot; circuit is; it only gives you an equivalent model.