isoelemicin from guatteria gaumeri

[3base]

journal of natural products 1985 48(2): 328-329
"phenylpropenes from the annonaceae, XVII.
phenylpropenes from uvariodendron connivens seeds"
mohammad, p g waterman, d w thomas

...
the corresponding phenylprop-2-en, trans-isoelemicin,
has previously been reported from another plant of the
annonaceae, guatteria gaumeri (3).
...
(3) phytochemistry 1980 19: 2024
     r g enquiquez, m a chavez, f jouregui

[3base]

see

Post 317544

(3base: "benzaldehydes via cleavage of styrenes", Chemistry Discourse) for suggestions how to cleave
isoelemicin to 3,4,5-trimethoxybenzaldehyde