2,6-diamino-5-hydroxyhexanoic acid 2,6-diamino-5-hydroxy-hexanoic acid 1190-94-9 5-Hydroxy-DL-lysine EINECS 227-840-2 delta-Hydroxylysine 5-hydroxy-L-lysine 5-hydroxylysine PROCOLLAGEN-5-HYDROXY-L-LYSINE procollagen 5-hydroxy-L-lysine procollagen L-erythro-5-hydroxy-L-lysine DL-Lysine, 5-hydroxy-