. . . . . . . . . "methanopterins"@en . . "\u043A\u043B\u0430\u0441 \u0445\u0456\u043C\u0456\u0447\u043D\u0438\u0445 \u0441\u043F\u043E\u043B\u0443\u043A"@uk . "methanopterins"@en . "37669" . "methanopterins"@en . "class of chemical compounds"@en . .