You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (12R)-4,23-dihydroxy-12-[(S)-(4-hydroxybutylamino)-[3-(hydroxymethyl)-4-(2-oxopropylamino)phenyl]methoxy]-3-methoxy-17,18-dithiatetracyclo[18.8.0.02,7.021,26]octacosa-1(20),2(7),3,5,21(26),22,24,27-octaen-10-one into its molecular formula.
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C42H52N2O8S2
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