Safety Study of SPC3649 in Healthy Men

Inclusion Criteria: * Healthy Volunteers * BMI: 19-28 kg/m2 * No clinically significant disease/disorder * Screening laboratory tests without clinically significant abnormalities, must agree to use condoms during intercourse for one week after study drug infusion * Following receipt of verbal and written information about the study, the subject must provide signed informed consent before any study related activity is carried out. Exclusion Criteria: * Heavy exercise within the past 7 days * Alcohol intake\> 21 units weekly * Regular smoker * Received experimental drug within 30 days of study entry * Planned participation in any experimental study during the study period * HIV-Ab, HBsAg and/or HCV Ab positive * History of specific allergy * Current use of any drug or narcotics.