You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
sodium;(E,1R,5S,7R)-7-(12-amino-9-oxa-11,13-diazatricyclo[13.3.1.03,8]nonadeca-1(19),3(8),4,6,11,15,17-heptaen-5-yl)-1-hydroxy-1-(4-hydroxyphenyl)non-2-ene-5-sulfonate is the IUPAC name of a molecule. Please give its molecular formula.
user
C31H36N3NaO6S
assistant