A compound of formula: wherein R 1, R 2, R 3, R 4, R 5, and R 6 are independently selected from hydrogen, alkyl, substituted alkyl, alkoxy, substituted alkoxy, acyl, acylamino, acyloxy, amino, substituted amino, aminoacyl, aminoacyloxy, oxyaminoacyl, azido, cyano, halogen, hydroxyl, carboxyl, carboxylalkyl, thiol, thioalkoxy, substituted thioalkoxy, aryl, aryloxy, hydroxyamino, alkoxyamino, nitro, -SO-alkyl, -SO-substituted alkyl, -SO-aryl, -SO-heteroaryl, -SO 2 -alkyl, -SO 2 -substituted alkyl, -SO 2 -aryl and -SO 2 -heteroaryl; or R 1 and R 2 together form an oxo group; or R 3 and R 4 together form an oxo group; or R 5 and R 6 together form an oxo group; R 7, R 8, R 9, and R 10 are independently selected from hydrogen, alkyl, substituted alkyl, alkoxy, substituted alkoxy, acyl, acylamino, acyloxy, amino, substituted amino, aminoacyl, aminoacyloxy, oxyaminoacyl, azido, cyano, halogen, hydroxyl, carboxyl, carboxylalkyl, thiol, thioalkoxy, substituted thioalkoxy, aryl, aryloxy, hydroxyamino, alkoxyamino, nitro, -SO-alkyl, -SO-substituted alkyl, -SO-aryl, -SO-heteroaryl, -SO 2 -alkyl, -SO 2 -substituted alkyl, -SO 2 -aryl and -SO 2 -heteroaryl; or R 7 and R 8 together form an oxo group; or R 9 and R 10 together form an oxo group; R 11 is selected from alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, hydroxy, alkoxy, substituted alkoxy, amino, substituted amino, carboxyl, carboxyl ester, cyano, halogen, thiol, thioalkoxy, substituted thioalkoxy, acyl, aminoacyl, nitro, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, -SO-alkyl, -SO-substituted alkyl, -SO-aryl, -SO-heteroaryl, -SO 2 -alkyl, -SO 2 -substituted alkyl, -SO 2 -aryl and -SO 2 -heteroaryl; R 20 is selected from hydrogen, alkyl, and substituted alkyl; G is -NY 2 Ar 1; Y 1 and Y 2 are independently selected from hydrogen, alkyl and substituted alkyl; and Ar 1 is selected from aryl, substituted aryl, heteroaryl, and substituted heteroaryl; or a salt or stereoisomer thereof; wherein: "alkyl" is a monovalent saturated aliphatic hydrocarbyl group having from 1 to 6 carbon atoms; "alkoxy" is a group -O-alkyl; "alkenyl" is a straight chain or branched hydrocarbyl group having from 2 to 6 carbon atoms and having at least 1 site of double bond unsaturation; and "alkynyl" is a straight or branched monovalent hydrocarbyl group having from 2 to 6 carbon atoms and having at least 1 site of triple bond unsaturation. R 1, R 2, R 3, R 4, R 5, and R 6 are independently selected from hydrogen, alkyl, substituted alkyl, alkoxy, substituted alkoxy, acyl, acylamino, acyloxy, amino, substituted amino, aminoacyl, aminoacyloxy, oxyaminoacyl, azido, cyano, halogen, hydroxyl, carboxyl, carboxylalkyl, thiol, thioalkoxy, substituted thioalkoxy, aryl, aryloxy, hydroxyamino, alkoxyamino, nitro, -SO-alkyl, -SO-substituted alkyl, -SO-aryl, -SO-heteroaryl, -SO 2 -alkyl, -SO 2 -substituted alkyl, -SO 2 -aryl and -SO 2 -heteroaryl; or R 1 and R 2 together form an oxo group; or R 3 and R 4 together form an oxo group; or R 5 and R 6 together form an oxo group; R 7, R 8, R 9, and R 10 are independently selected from hydrogen, alkyl, substituted alkyl, alkoxy, substituted alkoxy, acyl, acylamino, acyloxy, amino, substituted amino, aminoacyl, aminoacyloxy, oxyaminoacyl, azido, cyano, halogen, hydroxyl, carboxyl, carboxylalkyl, thiol, thioalkoxy, substituted thioalkoxy, aryl, aryloxy, hydroxyamino, alkoxyamino, nitro, -SO-alkyl, -SO-substituted alkyl, -SO-aryl, -SO-heteroaryl, -SO 2 -alkyl, -SO 2 -substituted alkyl, -SO 2 -aryl and -SO 2 -heteroaryl; or R 7 and R 8 together form an oxo group; or R 9 and R 10 together form an oxo group; R 11 is selected from alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, hydroxy, alkoxy, substituted alkoxy, amino, substituted amino, carboxyl, carboxyl ester, cyano, halogen, thiol, thioalkoxy, substituted thioalkoxy, acyl, aminoacyl, nitro, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, -SO-alkyl, -SO-substituted alkyl, -SO-aryl, -SO-heteroaryl, -SO 2 -alkyl, -SO 2 -substituted alkyl, -SO 2 -aryl and -SO 2 -heteroaryl; R 20 is selected from hydrogen, alkyl, and substituted alkyl; G is -NY 2 Ar 1; Y 1 and Y 2 are independently selected from hydrogen, alkyl and substituted alkyl; and Ar 1 is selected from aryl, substituted aryl, heteroaryl, and substituted heteroaryl; "alkyl" is a monovalent saturated aliphatic hydrocarbyl group having from 1 to 6 carbon atoms; "alkoxy" is a group -O-alkyl; "alkenyl" is a straight chain or branched hydrocarbyl group having from 2 to 6 carbon atoms and having at least 1 site of double bond unsaturation; and "alkynyl" is a straight or branched monovalent hydrocarbyl group having from 2 to 6 carbon atoms and having at least 1 site of triple bond unsaturation.