A New Class of Potent Vascular Endothelial Growth Factor Receptor Tyrosine Kinase Inhibitors: Structure−Activity Relationships for a Series of 9-Alkoxymethyl-12-(3-hydroxypropyl)indeno[2,1-<i>a</i>]pyrrolo[3,4-<i>c</i>]carbazole-5-ones and the Identification of CEP-5214 and Its Dimethylglycine Ester Prodrug Clinical Candidate CEP-7055Diane E. Gingrich, Robert L. Hudkins, D. Rajagopala Reddy et al.|Journal of Medicinal Chemistry|2003Cited by 74