You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4R,7S,10S,13R,16S,19S)-19-[[(2S)-2-amino-3-(4-chlorophenyl)propanoyl]amino]-N-[1-amino-3-(4-hydroxyphenyl)-1-oxopropan-2-yl]-13-[3-(carbamoylamino)propyl]-16-[(4-hydroxyphenyl)methyl]-7-methyl-10-[4-(methylamino)butyl]-6,9,12,15,18-pentaoxo-1,2-dithia-5,8,11,14,17-pentazacycloicosane-4-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C49H67ClN12O11S2
assistant