2-amino-9-((1S,3R,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-3H-purin-6(9H)-one-13C2 15N;2-Amino-1,9-dihydro-9-[(1S,3R,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl]-6H-Purin-6-one-15N-13C2; Baraclude-15N-13C2;Entecavir-15N-13C2
2-amino-9-((1S,3R,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-3H-purin-6(9H)-one-13C2 15N;2-Amino-1,9-dihydro-9-[(1S,3R,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl]-6H-Purin-6-one-15N-13C2; Baraclude-15N-13C2;Entecavir-15N-13C2