A Seven-Membered Carbon-Ring-Fused Phthalocyanine Analogue in which the pi System Changes during Dehydrogenation/Hydrogenation Cycles This research was supported by a Grant-in-Aid for Scientific Research (B) No. 11440192, Grant for Encouragement of Young Scientists No. 11740368, and Priority Area "Creation of Novel Delocalized Electron Systems" Grant No. 12020206 from the Ministry of Education, Science, Sports, and Culture, Japan, and the Scandinavia-Japan Sasakawa Foundation.