Definition: Adenosine 5'-(trihydrogen diphosphate). An adenine nucleotide containing two phosphate groups esterified to the sugar moiety at the 5'-position.
pyridoxal 5'-diphospho-5'-adenosine [ 5'-adenosine-5'-diphosphopyridoxal,ADP-pyridoxal,AP2PL,adenosine diphosphopyridoxal,pyridoxal 5'-diphospho-5'-adenosine, disodium salt ] structure given in first source