You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the SMILES representation of the molecule (1R,4R,5R,9Z,11R,12S,15R,16S)-4,5,12-trihydroxy-9,13,14-trimethyl-16-(2-methylpropyl)-17-azatricyclo[9.7.0.01,15]octadeca-9,13-diene-2,18-dione .
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