Compound 4
From the following article
A clickable inhibitor reveals context-dependent autoactivation of p90 RSK
Michael S Cohen, Haralambos Hadjivassiliou & Jack Taunton
Nature Chemical Biology 3, 156-160 (2007) Published online: 28 January 2007
doi:10.1038/nchembio859

Compound 4
2-Phthalimido-4'-methylacetophenone
