Molecular gas content and high excitation of a massive main-sequence galaxy at z = 3 Han Lei, Francesco Valentino, Georgios E. Magdis, Vasily Kokorev, Daizhong Liu, Dimitra Rigopoulou, Shuowen Jin and Emanuele Daddi A&A, 673 (2023) L13 Published online: 18 May 2023 DOI: 10.1051/0004-6361/202345925