You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3aS,6R,6aS)-N-[(2S)-1-[[(10S,16S,22S)-34-ethyl-26-hydroxy-10-methoxy-12,12-dimethyl-15,21-dioxo-14-oxa-8,20,34,36-tetrazaheptacyclo[27.3.1.13,32.116,20.124,28.02,11.04,9]hexatriaconta-1(32),2,4(9),5,7,24(35),25,27,29(33),30-decaen-22-yl]amino]-3-methyl-1-oxobutan-2-yl]-N-methyl-3,3a,4,5,6,6a-hexahydro-2H-furo[3,2-b]pyrrole-6-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C49H61N7O8
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