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US 2021/0276997 A1Published application
Crystal of pyrido[3,4-d]pyrimidine derivative or solvate thereof
AssigneeTeijin Pharma Limited
InventorsHidetoshi MIYAMOTO, Tsuyoshi MIZUNO, Gen JNIOKI, Yuki MIYAZAWA, Naoki YAJIMA
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Abstract
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, R1 represents a hydrogen atom or a C1-3 alkyl group; R2 represents a hydrogen atom or an oxo group; L represents a single bond or a C1-3 alkylene group; and X represents CH or N.
Claims40
A crystal of a compound represented by formula (I):
- wherein R1 represents a hydrogen atom or a C1-3 alkyl group, R2 represents a hydrogen atom or an oxo group, L represents a single bond or a C1-3 alkylene group, and X represents CH or N;
- or a solvate thereof.
Dependencies are inferred from the claim text.