L-Lysine-ω-15N1, αN-tBoc, ωN-Cbz derivative NALPHA-(T-BUTOXYCARBONYL)-N-EPS-(CARBOB& NALPHA-(T-BUTOXYCARBONYL)-N-EPS-(CARBOBE N-ZYLOXY)-L-LYSIN-EPS-15N, 99 ATOM % 15N NALPHA-(T-BUTOXYCARBONYL)-N-EPS-(CARBOBEN-ZYLOXY)-L-LYSIN-EPS-15N 98+ ATOM % 15N boc-lys(z)-oh-ε-15n nα-(tert-butoxycarbonyl)-nε-(carbobenzyloxy)-l-lysine-ε-15n L-Lysine-ε-15N1, αN-tBoc, εN-Cbz derivative, Nα-(tert-Butoxycarbonyl)-Nε-(carbobenzyloxy)-L-lysine-ε-15N