Task: Please create a molecule SMILES based on the text description below.
Description: The molecule is a branched C20 alkene consisting of a 19-carbon chain with a double bond between C-1 and C-2 and a methyl group at C-18.
Result: C=CCCCCCCCCCCCCCCCC(C)C
Task: Please {#give me|create|generate!} a {#molecule |!}{SMILES__description} based on the {#text |!}description{# below|!}.
Description: {description#}
Result: {SMILES#}
18-methylnonadec-1-ene
The molecule is a branched C20 alkene consisting of a 19-carbon chain with a double bond between C-1 and C-2 and a methyl group at C-18.