2-(4-bromophenyl)-6-phenyl-4H-thiopyran-4-one

2-(4-bromophenyl)-6-phenyl-4H-selenopyran-4-one

4-((2-(4-(diethoxyphosphoryl)phenyl)-6-phenyl-4H-selenopyran-4-ylidene)methyl)-2,6-diphenylthiopyrylium hexafluorophosphate

4-((2-(4-(diethoxyphosphoryl)phenyl)-6-phenyl-4H-thiopyran-4-ylidene)methyl)-2,6-diphenyltelluropyrylium hexafluorophosphate

2,6-diphenyl-4-((2-phenyl-6-(4-phosphonophenyl)-4H-selenopyran-4-ylidene)methyl)thiopyrylium hexafluorophosphate