Here's why:

* Chiral carbon: A carbon atom is considered chiral if it is bonded to four different groups.

* L-Dopa structure: L-Dopa (levodopa) is a molecule with the following structure: HOOC-CH₂-CH(NH₂)-CH₂-C₆H₄-OH.

* Identification: The two chiral carbons are the one attached to the amine group (NH₂) and the one attached to the carboxyl group (COOH). Both these carbons have four different groups attached to them.

Let me know if you'd like a visual representation of the L-Dopa structure!