PROBLEM TO BE SOLVED: To provide a novel solid form of a pladienolide pyridine compound, a composition comprising at least one such solid form, and a method of preparation and use thereof. (2S, 3S, 6S, 7R, 10R, E) -7,10-dihydroxy-3,7-dimethyl-12-oxo-2-((R, 2E, 4E) -6- (pyridine-) 2-yl) hepta-2,4-dien-2-yl) oxacyclododec-4-en-6-yl 4-methylpiperazine-1-carboxylate as well as a pharmaceutically acceptable carrier, pharmaceutically A pharmaceutical composition comprising at least one additional ingredient selected from an acceptable excipient and a pharmaceutically acceptable additive. [Selection figure] None【課題】プラジエノライドピリジン化合物の新規固体形態、少なくとも1つのこのような固体形態を含む組成物、及び調製の方法並びにそれの使用の提供。【解決手段】(2S,3S,6S,7R,10R,E)-7,10-ジヒドロキシ-3,7-ジメチル-12-オキソ-2-((R,2E,4E)-6-(ピリジン-2-イル)へプタ-2,4-ジエン-2-イル)オキサシクロドデカ-4-エン-6-イル4-メチルピペラジン-1-カルボキシレートの結晶形並びに医薬上許容しうる担体、医薬上許容しうる賦形剤、及び医薬上許容しうる添加剤から選択される少なくとも1つの追加の成分を含む、医薬組成物。【選択図】なし