The present invention relates to 5- (5- (2- (3-aminopropoxy) -6-methoxyphenyl) -1h-pyrazol-3-ylamino) pyrazine-2-carbonitrile (s) -lactate monohydrate chk1 / 2 and is useful in treating cancer.a presente invenção refere-se a (s)-lactato mono-hidrato de 5-(5-(2-(3-aminopropóxi)-6-metoxifenil)-1h-pirazol-3-ilamino)pirazina-2-carbonitrila que inibe chk1/2 e é útil no tratamento de câncer.