Provide the molecular formula for the IUPAC named substance (2R,3R,4S,5S,6R)-2-[[(2S,4aS,5R,6R,8aR)-6-hydroxy-5-[(3R)-3-hydroxy-3-methylpent-4-enyl]-1,1,4a,6-tetramethyl-3,4,5,7,8,8a-hexahydro-2H-naphthalen-2-yl]oxy]-6-(hydroxymethyl)oxane-3,4,5-triol .