Subjects with stable CHF with reduced ejection fraction and CKD Stage 2.• Adult male and female subjects without childbearing potential• Clinical diagnosis of CHF NYHA class II - III, treated with evidenced-based therapy for CHF [e.g. treatment with beta-blockers and ACEI or ARB as well as diuretics, unless contraindicated or not tolerated]• Left ventricular ejection fraction ≤40% measured by any modality in the subject’s medical history without intervening revascularization, cardiac surgery, or implantation of biventricular pacemaker in the meantime; for those subjects with cardiac intervention, left ventricular ejection fraction had to be re assessed and a value ≤40% re-confirmed once after the intervention