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Funding
This work was supported by the Japan Society for the Promotion of
Science (JSPS) Kakenhi Grants-in-Aid for Scientific Research (C) [grant
numbers 15K10894 and 18K09411]; and the Tsuchiya Memorial
Foundation [grant number 2017–2018].
Authorship statement
None.
Declaration of Competing Interest
None.
Acknowledgements
We thank Isao Sakata (Porphyrin Laboratory, Okayama, Japan) for
providing information on TONS504 and Akira Ichikawa (CCS, Kyoto,
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