palavras-chave 5-amino-4-cianopirazoles 5-amino-4-cyanopyrazoles Anticancer activity Atividade anticancerígena Cancro da mama triplo negativo N,N-dimethylacetamide dimethyl acetal N,N-dimethylformamide diethyl acetal N,N-dimetilacetamida dimetil acetal N,N-dimetilformamida dietil acetal Pirazolo[3,4- d]pirimidinas Pyrazolo[3,4-d]pyrimidines Triethylorthoformate Trietilortoformiato Triple-negative breast cancer