You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (2R,3'R,4'S,5'S,6'R,7S)-1-[(E)-3-[3-[(4-ethyl-1H-imidazol-5-yl)methyl]-4-hydroxyphenyl]prop-2-enoyl]-3',4',5,5'-tetrahydroxy-6'-(hydroxymethyl)-2-(3-hydroxypropyl)spiro[8,9-dihydro-3H-pyrano[2,3-g]indole-7,2'-oxane]-2-carboxylic acid .
user
C35H41N3O12
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