Task: Please create a SMILES based on the text description below.
Description: The molecule is a nucleobase analogue obtained by addition of an etheno group across positions 1 and N2 of guanine. It is an imidazopurine and a nucleobase analogue. It derives from a guanine.
Result: O=c1c2[nH]cnc2[nH]c2nccn12
Task: Please {#give me|create|generate!} a {#molecule |!}{SMILES__description} based on the {#text |!}description{# below|!}.
Description: {description#}
Result: {SMILES#}
1,4-dihydroimidazo[1,2-a]purin-9-one
The molecule is a nucleobase analogue obtained by addition of an etheno group across positions 1 and N2 of guanine. It is an imidazopurine and a nucleobase analogue. It derives from a guanine.