Scheme 1From: Structural optimization and evaluation of novel 2-pyrrolidone-fused (2-oxoindolin-3-ylidene)methylpyrrole derivatives as potential VEGFR-2/PDGFRβ inhibitorsSynthesis of key intermediate 3 [19] and 5-substituted 2-pyrrolidone-fused (2-oxoindolin-3-ylidene)methylpyrrole derivativesBack to article page