4. Discussion
In this study, naturally de-greened (yellow) leaves of the tropical
evergreen Sp. wallisii were examined for their Chl-catabolites
and FCC was found to accumulate prominently. In most earlier
investigations of senescent leaves, FCCs were only observed as
minor components and as transient precursors of NCCs
[4,15,22,23]. The main FCC from Sw-leaves, named Sw-FCC-62,
was remarkably abundant (>13% of the Chl in a green leaf). The
structure of Sw-FCC-62 was deduced and it was revealed to carry