An orally bioavailable, small-molecule focal adhesion kinase (FAK) inhibitor with potential antiangiogenic and antineoplastic activities. FAK inhibitor PF-04554878 inhibits FAK, which may prevent the integrin-mediated activation of several downstream signal transduction pathways, including ERK, JNK/MAPK and PI3K/Akt, thus inhibiting tumour cell migration, proliferation and survival. The tyrosine kinase FAK is , a signal transducer for integrins that is upregulated in many tumour cell types and is involved in tumour cell invasion, migration and proliferation.