You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2R,3R,4S,5R)-2-(6-amino-2-chloropurin-9-yl)-5-(ethylaminomethyl)oxolane-3,4-diol;(2S,3S,4R,5R)-5-(6-amino-2-chloropurin-9-yl)-N-ethyl-3,4-dihydroxyoxolane-2-carboxamide;tert-butyl 4-[[6-amino-9-[(2R,3R,4S,5S)-3,4-dihydroxy-5-(methylsulfanylmethyl)oxolan-2-yl]purin-2-yl]amino]butanoate into molecular formula.
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C43H62Cl2N18O12S
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