five children , who received calcium levulinate ( calcium 4-oxopentanoate ) intravenously in pharmacological doses excreted in the following 24-h period both 4-oxopentanoic acid ( 3.5 -- 11.0 mg/24 h ) and 4-hydroxypentanoic acid ( 4.5 -- 10.4 mg/24 h ) .
C0108124
calcium levulinate
C0006675
calcium