6-tert-Butyl-3-isopropylisoxazolo[5,4-d]pyrimidin-4(5H)-one
6-tert-Butyl-3-isopropylisoxazolo[5,4-d]pyrimidin-4(5H)-one ??
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6-tert-Butyl-3-isopropylisoxazolo[5,4-d]pyrimidin-4(5H)-one ?? ??
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