Outside Front Cover: Meso‐Strap Engineering of Aromaticity Redistribution in Porphyrinoids

In Research Article e1446865, Atsuhiro Osuka, Jianxin Song, and co-workers describe the porphine core collapsing it [18]p aromatic framework through meso-strap engineering, which is similar as cocoon to butterfly. This work reveals a clear structure–strain–aromaticity relationship, establishing meso-strap engineering as a powerful strategy for controlling aromaticity redistribution in complex porphyrinoid architectures.