A research group led by Prof. Hiroshi Abe of Nagoya University and the Institute for Glycobiology Core Research (iGCORE) published "Cap analogs with a hydrophobic photocleavable tag enable facile purification of fully capped mRNA with various cap structures," in the journal Nature Communications on May 11, 2023.
https://www.nagoya-u.ac.jp/researchinfo/result-en/2023/07/20230602-01.html