The present invention relates to Bicyclic Pyranone Derivatives, their compositions and uses for treating or preventing a metabolic disorder, dyslipidemia, a cardiovascular disease, a neurological disorder, a hematological disease, cancer, inflammation, a respiratory disease, a gastroenterological disease, diabetes, a diabetic complication, obesity, an obesity-related disorder or non-alcoholic fatty liver disease. Formula (I). Y is —C— when an optional and additional bond is present and Y is —CH— when an optional and additional bond is not present; Z is —O—, —NH— or —N(alkyl)- when the optional and additional bond between Y and Z Is absent, and Z Is —N— when the optional and additional bond between Y and Z is present; R1 is H1 halo or —CN; R2 is alkyl, alkenyl or -(alkyleneVcydoalkyl; t is 0 or 1; R3 is O when the optional and additional bond between Y and R3 is present, and R3 is alkyl.haloalkyl.—C(0)0R5.-alkylene-O-alkyt or —O-alkyl when the optional and additional bond between Y and R3 is absent: R4 is H, alkyl or aryl, wherein an aryl group can be unsubstituted or optionally substituted.