What is the molecular formula of the compound with this IUPAC name ditert-butyl 2-[(2S)-3-methoxy-2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-oxopropyl]-6-methyl-4-[[(2R,3S,4R,5S,6R)-3,4,5-tris(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl]methyl]pyridine-3,5-dicarboxylate ?