Task: Please create a molecule SMILES based on the description below.
Description: The molecule is an optically active form of selenocystathionine in which both amino acid residues have L-configuration. It is a tautomer of a L-selenocystathionine zwitterion.
Result: N[C@@H](CC[Se]C[C@H](N)C(=O)O)C(=O)O
Task: Please {#give me|create|generate!} a {#molecule |!}{SMILES__description} based on the {#text |!}description{# below|!}.
Description: {description#}
Result: {SMILES#}
N[C@@H](CC[Se]C[C@H](N)C(=O)O)C(=O)O
(2S)-2-amino-4-[(2R)-2-amino-2-carboxyethyl]selanylbutanoicacid
The molecule is an optically active form of selenocystathionine in which both amino acid residues have L-configuration. It is a tautomer of a L-selenocystathionine zwitterion.