A compound of Formula: or a pharmaceutically acceptable salt thereof, wherein: R 1A is substituted or unsubstituted phenyl, substituted or unsubstituted benzyl, or substituted or unsubstituted 6-membered heteroaryl; R 1 is substituted or unsubstituted C 1-6 alkyl, halogen,-OR a, or -N(R a1) 2; each instance of R A is halogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, -OR a, -N(R a1) 2, -SR a, -CN, -C(=O)R a, -C(=O)OR a, -C(=O)N(R a1) 2, or -NO 2; each instance of R B is halogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, -OR a, -N(R a1) 2, -SR a, -CN, -C(=O)R a, -C(=O)OR a, -C(=O)N(R a1) 2, or -NO 2; each instance of R a is independently hydrogen, substituted or unsubstituted acyl, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, a nitrogen protecting group when attached to a nitrogen atom, an oxygen protecting group when attached to an oxygen atom, or a sulfur protecting group when attached to a sulfur atom; each instance of R a1 is independently hydrogen, substituted or unsubstituted acyl, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, a nitrogen protecting group when attached to a nitrogen atom, or two instances of R a1 are joined to form a substituted or unsubstituted, heterocyclic ring, or substituted or unsubstituted, heteroaryl ring; a is 1, 2, or 3; and b is 0, 1, 2, or 3. R 1A is substituted or unsubstituted phenyl, substituted or unsubstituted benzyl, or substituted or unsubstituted 6-membered heteroaryl; R 1 is substituted or unsubstituted C 1-6 alkyl, halogen,-OR a, or -N(R a1) 2; each instance of R A is halogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, -OR a, -N(R a1) 2, -SR a, -CN, -C(=O)R a, -C(=O)OR a, -C(=O)N(R a1) 2, or -NO 2; each instance of R B is halogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, -OR a, -N(R a1) 2, -SR a, -CN, -C(=O)R a, -C(=O)OR a, -C(=O)N(R a1) 2, or -NO 2; each instance of R a is independently hydrogen, substituted or unsubstituted acyl, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, a nitrogen protecting group when attached to a nitrogen atom, an oxygen protecting group when attached to an oxygen atom, or a sulfur protecting group when attached to a sulfur atom; each instance of R a1 is independently hydrogen, substituted or unsubstituted acyl, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, a nitrogen protecting group when attached to a nitrogen atom, or two instances of R a1 are joined to form a substituted or unsubstituted, heterocyclic ring, or substituted or unsubstituted, heteroaryl ring; a is 1, 2, or 3; and b is 0, 1, 2, or 3.