Others are wrong. Please see the Reddit post where it shows the topmost portion. It has only three edges. It’s open-topped.
As for the methyl and CH3 groups, that’s where, as noted, I begin to suspect erroneous human pattern recognition, but I’d also see a universe where those were too cumbersome to incorporate as elements of a functional shelf (unlike the carbonyl group, albeit that’s only one layer) and thus were ignored.
Others are wrong. Please see the Reddit post where it shows the topmost portion. It has only three edges. It’s open-topped.
As for the methyl and CH3 groups, that’s where, as noted, I begin to suspect erroneous human pattern recognition, but I’d also see a universe where those were too cumbersome to incorporate as elements of a functional shelf (unlike the carbonyl group, albeit that’s only one layer) and thus were ignored.
The two going straight up just to terminate are also not contributing to a functional shelf.