You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule methyl 2-[2-[[2-[8-(2-methylbutan-2-yl)-2,4-dioxo-1,3-diazaspiro[4.5]decan-3-yl]acetyl]amino]-1,3-thiazol-4-yl]acetate .
user
C21H30N4O5S
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