You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(5-methylsulfanyl-1,3,4-thiadiazol-2-yl)methyl]-5-nitro-1,3,4-thiadiazole;2-[(5-methylsulfanyl-1,3-thiazol-2-yl)methyl]-5-nitro-1,3,4-thiadiazole;2-[(5-methylsulfanyl-1,3-thiazol-2-yl)methyl]-5-nitro-1,3-thiazole;2-methylsulfinyl-5-[(5-nitro-1,3-thiazol-2-yl)methyl]-1,3,4-thiadiazole;2-[(5-methylsulfinyl-1,3,4-thiadiazol-2-yl)methyl]-5-nitro-1,3,4-thiadiazole;2-[(5-methylsulfinyl-1,3-thiazol-2-yl)methyl]-5-nitro-1,3,4-thiadiazole;2-[(5-methylsulfinyl-1,3-thiazol-2-yl)methyl]-5-nitro-1,3-thiazole is the IUPAC name of a molecule. Please give its molecular formula.
user
C49H42N28O18S21
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