CNS(=O)(=O)CN1Cc2ccccc2C(C(=O)Nc2cncc3ccccc23)C1
CNC(=O)CCN1Cc2ccccc2C(C(=O)Nc2cncc3ccccc23)C1
O=C(CN1Cc2ccccc2C(C(=O)Nc2cncc3ccccc23)C1)NC1CC1
N#CCNC(=O)CN1Cc2ccccc2C(C(=O)Nc2cncc3ccccc23)C1
CS(=O)(=O)CNC(=O)CN1Cc2ccccc2C(C(=O)Nc2cncc3ccccc23)C1
Analogues of MAT-POS-4223bc15-23 modulating internal hydrogen bond proposed from x-ray. Avoid over acidifying the pendant NH to prevent zwitterion formation.