Task: Please create a SMILES based on the text description.
Description: The molecule is an optically active form of allantoin having (R)-(-)-configuration. It has a role as a mouse metabolite. It is an enantiomer of a (S)-(+)-allantoin.
Result: NC(=O)N[C@@H]1NC(=O)NC1=O
Task: Please {#give me|create|generate!} a {#molecule |!}{SMILES__description} based on the {#text |!}description{# below|!}.
Description: {description#}
Result: {SMILES#}
[(4R)-2,5-dioxoimidazolidin-4-yl]urea
The molecule is an optically active form of allantoin having (R)-(-)-configuration. It has a role as a mouse metabolite. It is an enantiomer of a (S)-(+)-allantoin.