6-methoxy-1-oxy-pyrrolo[3,4-c][1,2,5]oxadiazol-4-ylideneamine; potassium salt 生成 dipotassium;6-[[(6Z)-6-(6-imino-4-methoxy-3-oxidopyrrolo[3,4-c][1,2,5]oxadiazol-3-ium-5-id-4-yl)imino-4-methoxy-3-oxidopyrrolo[3,4-c][1,2,5]oxadiazol-3-ium-5-id-4-yl]amino]-4-methoxy-3-oxidopyrrolo[3,4-c][1,2,5]oxadiazol-3-ium-4-ol