Crystal of pyrido[3, 4-d]pyrimidine derivative or solvate thereof

Provided is a crystal of a novel pyrido[3, 4-d]pyrimidine derivative having excellent CDK 4/6 inhibitory activity. A crystal of a compound represented by formula (I). In the formula, R

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Bibliographische Detailangaben
Hauptverfasser: Miyamoto, Hidetoshi, Miyazawa, Yuki, Unoki, Gen, Yajima, Naoki, Mizuno, Tsuyoshi
Format: Patent
Sprache:eng
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Zusammenfassung:Provided is a crystal of a novel pyrido[3, 4-d]pyrimidine derivative having excellent CDK 4/6 inhibitory activity. A crystal of a compound represented by formula (I). In the formula, R