573435 A2P ascorbate 2-phosphate 8 652379 AsP ascorbate-2-phosphate 4 2374129 AsAP ascorbate-2-phosphate 2 2271539 Asc-2-P L-ascorbate-2-phosphate 2 538727 2-AP ascorbate-2-phosphate 1 573429 A-2-P ascorbate-2-phosphate 1 2374140 Asc-2 ascorbate-2-phosphate 1 2375331 AscP ascorbate-2-phosphate 1