A compound represented by a formula: or a salt thereof; wherein a dashed line represents the presence or absence of a bond; A 1 is CR 1, NR 1A, or N; A 2 is CR 2, NR 2A, O, or S; B 1 is CR 5 or N; B 2 is CR 6 or N; B 3 is CR 7 orN; R 1 and R 2 are independently F, Cl, Br, I, NO 2, CN, R a, -OR a, -NR a R b, -NHCOR a, -NHSO 2 R a, -OCOR a, or -SO 2 R a; X is O, and R 3 is H or C 1-30 organyl; R 1A, R 2A, R 4, R a, and R b are independently H or C 1-30 organyl; R 5, R 6, and R 7 are independently F, Cl, Br, I, NO 2, CN, R a, -OR a, -NR a R b, -NHCOR a, -NHSO 2 R a, -OCOR a, -SO 2 R a, -SO 2 NHR a, or -X 1 - (C m H 2m O 0-1)-Z-(C n H 2n+1), - C m H 2m O 0-1) -Z- (C n H 2n+1), wherein R 5 and R 6 or R 6 and R 7 can be optionally linked to form a ring; wherein X 1 is a bond, O, NR a, -CO-, -SO-, or -SO 2 -; Z is a bond, O, NHSO 2, or NHCO; m is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10; and n is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, or 23; wherein C 1-30 organyl is: optionally substituted C 1-30, C 1-12, C 1-6, or C 1-3 alkyl, including methyl, ethyl, C 3 alkyl, C 4 alkyl, C 5 alkyl, C 6 alkyl, C 7 alkyl, C 8 alkyl, C 9 alkyl, C 10 alkyl, C 11 alkyl, C 12 alkyl, C 13 alkyl, C 14 alkyl, C 15 alkyl, C 16 alkyl, C 17 alkyl, C 18 alkyl, C 19 alkyl, C 20 alkyl, C 21 alkyl, C 22 alkyl, C 23 alkyl, C 24 alkyl, C 25 alkyl, C 26 alkyl, C 27 alkyl, C 28 alkyl, C 29 alkyl, C 30 alkyl, C 3 cycloalkyl, C 4 cycloalkyl, C 5 cycloalkyl, C 6 cycloalkyl, C 7 cycloalkyl, C 8 cycloalkyl, C 9 cycloalkyl, C 10 cycloalkyl, C 11 cycloalkyl, or C 12 cycloalkyl; optionally substituted alkenyl, including optionally substituted C 2-12 or C 2-6, alkenyl, including ethenyl, C 3 alkenyl, C 4 alkenyl, C 5 alkenyl, C 6 alkenyl, C 7 alkenyl, C 8 alkenyl, C 9 alkenyl, C 10 alkenyl, C 11 alkenyl, C 12 alkenyl, C 4 cycloalkenyl, C 5 cycloalkenyl, C 6 cycloalkenyl, C 7 cycloalkenyl, C 8 cycloalkenyl, C 9 cycloalkenyl, C 10 cycloalkenyl, C 11 cycloalkenyl, or C 12 cycloalkenyl; optionally substituted alkynyl, including optionally substituted C 2-12 or C 2-6 alkynyl, including ethynyl, C 3 alkynyl, C 4 alkynyl, C 5 alkynyl, C 6 alkynyl, C 7 alkynyl, C 8 alkynyl, C 9 alkynyl, C 10 alkynyl, C 11 alkynyl, C 12 alkynyl, C 5 cycloalkynyl, C 6 cycloalkynyl, C 7 cycloalkynyl, C 8 cycloalkynyl, C 9 cycloalkynyl, C 10 cycloalkynyl, C 11 cycloalkynyl, or C 12 cycloalkynyl; optionally substituted aryl, including optionally substituted phenyl or optionally substituted naphthyl; optionally substituted heterocyclyl, including optionally substituted heteroaryl; CN, -C R a, -C OR a, -C NHR a, -C NR a R b, -C -Z 1 -organyl, wherein Z 1 is a bond, O, S, or NR a R b, -C(R a R b)-OR a, -C(R a R b)-NR a R b, wherein optionally substituted refers to optional substitution by halogen, hydroxyl, amine, alkoxyl, aryl, heteroaryl, sulfone, sulfonamide, carboxylic acid, amide, reversed amide, ester, cycloalkyl, heterocycloalkyl, carbonyl, alkyl, alkenyl, alkynyl, phosphonamidic acid, phosphinic amide, or phosphine oxide. A 1 is CR 1, NR 1A, or N; A 2 is CR 2, NR 2A, O, or S; B 1 is CR 5 or N; B 2 is CR 6 or N; B 3 is CR 7 orN; R 1 and R 2 are independently F, Cl, Br, I, NO 2, CN, R a, -OR a, -NR a R b, -NHCOR a, -NHSO 2 R a, -OCOR a, or -SO 2 R a; X is O, and R 3 is H or C 1-30 organyl; R 1A, R 2A, R 4, R a, and R b are independently H or C 1-30 organyl; R 5, R 6, and R 7 are independently F, Cl, Br, I, NO 2, CN, R a, -OR a, -NR a R b, -NHCOR a, -NHSO 2 R a, -OCOR a, -SO 2 R a, -SO 2 NHR a, or -X 1 - (C m H 2m O 0-1)-Z-(C n H 2n+1), - C m H 2m O 0-1) -Z- (C n H 2n+1), wherein R 5 and R 6 or R 6 and R 7 can be optionally linked to form a ring; wherein X 1 is a bond, O, NR a, -CO-, -SO-, or -SO 2 -; Z is a bond, O, NHSO 2, or NHCO; m is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10; and n is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, or 23; wherein C 1-30 organyl is: optionally substituted C 1-30, C 1-12, C 1-6, or C 1-3 alkyl, including methyl, ethyl, C 3 alkyl, C 4 alkyl, C 5 alkyl, C 6 alkyl, C 7 alkyl, C 8 alkyl, C 9 alkyl, C 10 alkyl, C 11 alkyl, C 12 alkyl, C 13 alkyl, C 14 alkyl, C 15 alkyl, C 16 alkyl, C 17 alkyl, C 18 alkyl, C 19 alkyl, C 20 alkyl, C 21 alkyl, C 22 alkyl, C 23 alkyl, C 24 alkyl, C 25 alkyl, C 26 alkyl, C 27 alkyl, C 28 alkyl, C 29 alkyl, C 30 alkyl, C 3 cycloalkyl, C 4 cycloalkyl, C 5 cycloalkyl, C 6 cycloalkyl, C 7 cycloalkyl, C 8 cycloalkyl, C 9 cycloalkyl, C 10 cycloalkyl, C 11 cycloalkyl, or C 12 cycloalkyl; optionally substituted alkenyl, including optionally substituted C 2-12 or C 2-6, alkenyl, including ethenyl, C 3 alkenyl, C 4 alkenyl, C 5 alkenyl, C 6 alkenyl, C 7 alkenyl, C 8 alkenyl, C 9 alkenyl, C 10 alkenyl, C 11 alkenyl, C 12 alkenyl, C 4 cycloalkenyl, C 5 cycloalkenyl, C 6 cycloalkenyl, C 7 cycloalkenyl, C 8 cycloalkenyl, C 9 cycloalkenyl, C 10 cycloalkenyl, C 11 cycloalkenyl, or C 12 cycloalkenyl; optionally substituted alkynyl, including optionally substituted C 2-12 or C 2-6 alkynyl, including ethynyl, C 3 alkynyl, C 4 alkynyl, C 5 alkynyl, C 6 alkynyl, C 7 alkynyl, C 8 alkynyl, C 9 alkynyl, C 10 alkynyl, C 11 alkynyl, C 12 alkynyl, C 5 cycloalkynyl, C 6 cycloalkynyl, C 7 cycloalkynyl, C 8 cycloalkynyl, C 9 cycloalkynyl, C 10 cycloalkynyl, C 11 cycloalkynyl, or C 12 cycloalkynyl; optionally substituted aryl, including optionally substituted phenyl or optionally substituted naphthyl; optionally substituted heterocyclyl, including optionally substituted heteroaryl; CN, -C R a, -C OR a, -C NHR a, -C NR a R b, -C -Z 1 -organyl, wherein Z 1 is a bond, O, S, or NR a R b, -C(R a R b)-OR a, -C(R a R b)-NR a R b,