The present invention discloses certain new solid state forms of (S)-4-amino-N-(1-(4-chlorophenyl)-3-hydroxypropyl)-1-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)piperidine-4-carboxamide, processes for preparing such forms, pharmaceutical compositions comprising them, and the use of such forms in therapy.本發明揭示(S)-4-胺基-N-(1-(4-氯苯基)-3-羥丙基)-1-(7H-吡咯并[2,3-d]嘧啶-4-基)哌啶-4-甲醯胺之某些新穎固態形式;該等形式之製備方法;包含其等之醫藥組合物,及該等形式於治療之用途。