Ekadashi's paper on designing the smallest intramolecular singlet fission chromophore with the fastest singlet fission has been accepted for publication on J. Phys. Chem. Lett. The new design is obtained by introducing four N-oxyl into the anthracene pristine structure. The resultant chromophore contains only 18 non-H atoms, and exhibits an unprecedentedly fast singlet fission with a 16 fs time scale. It can generates a pair of triplet excitons within its small framework, leading to a high exciton density in organic photovoltaic device.