label: N(4),N(alpha),N(alpha),N(epsilon),N(epsilon)-(pentakis(carboxymethyl))-N(4)-(carboxymethyl)-2,6-diamino-4-azahexanoic hydrazide
label_lc: n(4),n(alpha),n(alpha),n(epsilon),n(epsilon)-(pentakis(carboxymethyl))-n(4)-(carboxymethyl)-2,6-diamino-4-azahexanoic hydrazide