“…Although extensive structural determinations have not been carried out. it has been possible to treat the stereochemistry of substituted cyclohexenes (21,22,23,24,77,104) in a fashion analogous to that used for cyclohexanes (103). Figure 1 shows the chair form or ''half chair" form and figure 2 the boat form or "half boat'' form which are possible for the cyclohexene ring (21).…”