610
Geraniol
CHO
W. SANDERMANN
.CHO
(LXXI)
In Perilla
nankinensis
CH 2 OH
(LXIX)
(LXXII)
In Perilla
citriodora
CHO
CHO
(LXX)
(LXXIII)
In Perilla
frutescens
Brit.
In Mentha. spp. the formation of menthofuran (LXXVII) could
proceed from pulegone (LXXIV), which could also be the precursor
for menthone (LXXVIII) and menthol (LXXIX).
(LXXV)
(LXXVI)
(LXXVn)
Saturated oxides, such as cineol, can be formed by splitting oflF water
between two hydroxyl groups. A special situation is the biogenesis of