Task: Please give me a SMILES based on the 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-17.
Result: C=CCCCCCCCCCCCCCCC(C)CC
Task: Please {#give me|create|generate!} a {#molecule |!}{SMILES__description} based on the {#text |!}description{# below|!}.
Description: {description#}
Result: {SMILES#}
17-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-17.