1-Piperazinecarboxylic acid, 4-cycloheptyl-, (2S,3S,4E,6S,7R,10R)-7,10-dihydroxy-2-((1E,3E,5R)-5-hydroxy-6-((2R,3R)-3-((1R,2S)-2-hydroxy-1-methylbutyl)oxiranyl)-1,5-dimethyl-1,3-hexadienyl)-3,7-dimethyl-12-oxooxacyclododec-4-en-6-yl ester
Pladienolide Derivative E7107 is a synthetic urethane derivative of pladienolide D with potential antineoplastic activity. Pladienolide derivative E7107 is generated from the 12-membered macrolide pladienolide D, one of several macrolides derived from the bacterium Streptomyces platensis Mer-11107. This agent appears to bind to the 130-kDa subunit 3 (spliceosome-associated protein 130; SAP130) of the splicing factor 3b (SF3b), resulting in inhibition of pre-messenger RNA splicing and the arrest of cell-cycle progression. The splicing factor SF3b is a multiprotein complex integral to the accurate excision of introns from pre-messenger RNA; the subunit SAP130 associates with U2 snRNP and is recruited to prespliceosomal complexes.