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Phthalazin

Pteridin

Quinoxalin

Benzo Pteridine

Benzo Quinoxaline

Phthalazinone

Quinoxalinone

Pteridinone

[]Phthalazine

[]Pteridine

[]Quinoxaline

Phthalazine

Porphine

Pteridine

Quinoxaline

Quinoxalinol

AminoPteridin

Piperazin

Piperazinone

[]Piperazine

Piperazine

Piperazine Iodo

[4,5-b]Quinoxale

[2,3-a]Quinolizine

[4,5-f]Quino