Pharmacokinetics of Valerenic Acid in Rats after Intravenous and Oral Administrations - Sampath, Chethan; Haug, Karin; Thanei, Sophia; Hamburger, Matthias; Derendorf, Hartmut; Frye, Reginald; Butterweck, Veronika (Planta Medica, 2012)