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The pyrazolo[3,4-\n                    <jats:italic>d<\/jats:italic>\n                    ]pyrimidine ring system forms a dihedral angle of 34.72\u2005(6)\u00b0 with the phenyl ring. In the crystal, classical N\u2014H...O and non-classical C\u2014H...O and C\u2014H...N intermolecular interactions result in the formation of supramolecular bands extending parallel to the\n                    <jats:italic>a<\/jats:italic>\n                    axis. Additional \u03c0...\u03c0 interactions between pyrimidine and pyrazole rings, and C\u2014H...\u03c0 interactions between neighboring phenyl rings consolidate the packing.\n                  <\/jats:p>","DOI":"10.1107\/s205698902500934x","type":"journal-article","created":{"date-parts":[[2025,10,27]],"date-time":"2025-10-27T07:11:06Z","timestamp":1761549066000},"page":"1076-1079","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":0,"title":["Crystal structure of 1-phenyl-1\n                    <i>H<\/i>\n                    -pyrazolo[3,4-\n                    <i>d<\/i>\n                    ]pyrimidin-4(5\n                    <i>H<\/i>\n                    )-one"],"prefix":"10.1107","volume":"81","author":[{"given":"Nilufar","family":"Akhmedova","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/05515rj28","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ilkhom","family":"Ortikov","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nilufar","family":"Khasanova","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kosim","family":"Zokhidov","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5741-6347","authenticated-orcid":true,"given":"Kambarali","family":"Turgunov","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/05515rj28","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9372-8249","authenticated-orcid":true,"given":"Burkhon","family":"Elmuradov","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/05515rj28","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"329","published-online":{"date-parts":[[2025,10,28]]},"reference":[{"key":"wm5773_bb1","unstructured":"Bruker (2023). 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