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system
[(2R,4S,5R)-5-(4-amino-5-methyl-2-oxopyrimidin-1-yl)-3-[[(2R,4S,5R)-3-[[(2R,4S,5R)-5-(4-amino-5-methyl-2-oxopyrimidin-1-yl)-3-[[(2R,4S,5R)-5-(4-amino-5-methyl-2-oxopyrimidin-1-yl)-3-[[(2R,5R)-5-(6-aminopurin-9-yl)-3-[hydroxy(methoxy)phosphinothioyl]oxyoxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-4-(3-methoxypropyl)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-4-(2-methoxyethoxy)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-5-(6-aminopurin-9-yl)-4-(2-methoxyethoxy)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-4-(2-methoxyethoxy)oxolan-2-yl]methyl [(2R,4S,5R)-2-[[hydroxy-[(2R,4S,5R)-2-(hydroxymethyl)-4-(2-methoxyethoxy)-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-3-yl]oxyphosphinothioyl]oxymethyl]-4-(2-methoxyethoxy)-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-3-yl] hydrogen phosphate;[(2R,4S,5R)-2-[[[(2R,5R)-2-[[[(2R,5R)-5-(4-amino-5-methyl-2-oxopyrimidin-1-yl)-2-ethyloxolan-3-yl]oxy-hydroxyphosphinothioyl]oxymethyl]-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-3-yl]oxy-hydroxyphosphinothioyl]oxymethyl]-4-(2-methoxyethoxy)-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-3-yl] [(2R,4S,5R)-5-(4-amino-5-methyl-2-oxopyrimidin-1-yl)-3-[hydroxy-[[(2R,4S,5R)-3-[hydroxy-[[(2R,4S,5R)-3-hydroxy-4-(2-methoxyethoxy)-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-2-yl]methoxy]phosphinothioyl]oxy-4-(2-methoxyethoxy)-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-2-yl]methoxy]phosphinothioyl]oxy-4-(2-methoxyethoxy)oxolan-2-yl]methyl hydrogen phosphate;1-[(2R,5R)-4-[[(2R,5R)-3-[[(2R,5R)-3-[[(2R,5R)-3-[[(2R,5R)-3-[[(2R,5R)-3-[[(2R,5R)-5-(4-amino-5-methyl-2-oxopyrimidin-1-yl)-3-[hydroxy(methoxy)phosphinothioyl]oxyoxolan-2-yl]methoxy-hydroxyphosphinothioyl]oxy-5-(6-aminopurin-9-yl)oxolan-2-yl]methoxy-hydroxyphosphinothioyl]oxy-5-(2-amino-6-oxo-1H-purin-9-yl)oxolan-2-yl]methoxy-hydroxyphosphinothioyl]oxy-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-2-yl]methoxy-hydroxyphosphinothioyl]oxy-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-2-yl]methoxy-sulfanylphosphoryl]oxy-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-2-yl]methoxy-hydroxyphosphinothioyl]oxy-5-ethyloxolan-2-yl]-5-methylpyrimidine-2,4-dione;ethane The above is the IUPAC name of a molecule. Write its molecular formula.
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C239H349N58O131P19S13
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