Fig. 1.
Structures of SCR7 derivatives. In (A) is shown the structure of SCR7 as reported by Srivastava et al. [11]. The structure of the major product generated by the synthesis protocol described by Srivastava et al. [11] and by a different synthesis method [20] (SCR7-G) and the compound sold as SCR7 by XcessBio (SCR7-X) are shown. Our structure determination of the SCR7 provided by Dr. Sathees Raghavan (SCR7-R) and the pan human DNA ligase inhibitor (L189) described by Chen et al. [2] are also shown.