You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(4R,9R,18R,23R,32R,37R)-10,17,24,31,38-pentakis(carboxymethyl)-3,10,17,24,31,38-hexazaheptacyclo[38.2.2.212,15.226,29.04,9.018,23.032,37]octatetraconta-1(43),12,14,26(46),27,29(45),40(44),41,47-nonaen-3-yl]acetic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C54H72N6O12
assistant