It’s only fair to share… Carotegrast methyl Formula C28H26Cl2N4O5 CAS 401905-67-7 Mol weight 569.4358 PMDA APROVED, CAROGRA, カロテグラストメチル ON 2022/3/28 Antiasthmatic, Integrin alpha 4 inhibitor An alpha4 integrin antagonist. 401905-67-7 [RN] L-Phenylalanine, N-(2,6-dichlorobenzoyl)-4-[6-(dimethylamino)-1,4-dihydro-1-methyl-2,4-dioxo-3(2H)-quinazolinyl]-, methyl ester methyl (2S)-2-[(2,6-dichlorophenyl)formamido]-3-{4-[6-(dimethylamino)-1-methyl-2,4-dioxo-1,2,3,4-tetrahydroquinazolin-3-yl]phenyl}propanoate Methyl N-(2,6-dichlorobenzoyl)-4-[6-(dimethylamino)-1-methyl-2,4-dioxo-1,4-dihydro-3(2H)-quinazolinyl]-L-phenylalaninate Carotegrast Methyl Methyl (2S)-2-(2,6-dichlorobenzamido)-3-{4-[6-(dimethylamino)-1-methyl-2,4-dioxo-1,4-dihydroquinazolin-3(2H)-yl]phenyl}propanoate C28H26Cl2N4O5 : 569.44 [401905-67-7] PATENT WO 2008062859 https://patents.google.com/patent/WO2008062859A1/en Step 1 (Method 2): The title compound …