You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [(11S)-11-[[(2S)-2-[[(2R)-2-[[5-bromo-2-(butylcarbamoylamino)-3,4-dihydro-1H-naphthalene-2-carbonyl]amino]-3-phenylpropanoyl]amino]-5-(diaminomethylideneamino)pentanoyl]amino]-10-oxo-9-aza-1-phosphatetracyclo[11.6.1.03,8.014,19]icosa-3,5,7,13(20),14,16,18-heptaen-2-ylidene]azanium by IUPAC nomenclature, provide its molecular formula.
user
C49H57BrN10O5P+
assistant