Ball-and-stick model of the L -DOPA molecule, C ₉ H ₁₁ NO ₄ , in the zwitterionic form found in the crystal structure determined by single-crystal X-ray diffraction and reported in Acta Cryst. B (1995) 51 , 328-337 ( CSD entry LDOPAS03 ).

Colour code:

Carbon, C: grey

Hydrogen, H: white

Nitrogen, N: blue

Oxygen, O: red