110683-02-8 BRN 6772418 DL-Leucine, N-(3,7-dimethyl-1-oxo-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8-nonatetraenyl)-, (all-E)- N-(Retinoyl)-DL-leucine N-(all-trans-Retinoyl)-DL-leucine