"Plegridy, Plegridy Pen" . . . "1211327-92-2" . "Peginterferon beta-1a" . "DB09122" . "C913H1417N246O256PS7[C2H4O]n" . "Peginterferon beta-1a" . . "I8309403R0" . . . "D10483" . "a614059" .