What is the molecular formula of the compound with this IUPAC name methyl (2R)-2-[[(13R)-13-tert-butyl-7-(2-methylphenyl)-8-oxo-16-thia-2,4,5,7-tetrazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-3-yl]sulfanyl]propanoate ?