Figure 2.

Atomic labeling of d-glucose in ball and stick representation and the internal rotations of C5–C6 which would produce the configurations gg, gt, and tg, respectively, and C6–O6 which would produce the configurations g+, t, and g–, respectively. The orientation of each hydroxyl group on C1, C2, C3, C4 is denoted “c” in the clockwise direction, “r” in the counterclockwise direction, or “0” for neither.