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system
Name the molecular formula for the molecule established as (20S,21S)-3,10-ditert-butyl-15,17,20,21-tetramethylpentacyclo[10.7.2.05,20.08,21.013,19]henicosa-1(19),2,4,6,8,10,12,14,17-nonaen-16-one using the IUPAC nomenclature.
user
C33H38O
assistant