Alternate conversion between vitamin A and retinene.
D012168:Retinal Pigments / Q000737:chemistry*; D012172:Retinaldehyde; D014801:Vitamin A / Q000737:chemistry*
D012168:Retinal Pigments; D014801:Vitamin A; D012172:Retinaldehyde
RETINAL PIGMENTS/chemistry; VITAMIN A/chemistry