different between ladderane vs pterodactylane

English

ladder +? -ane, from the resemblance of its chemical structure to a ladder.

ladderane (plural ladderanes)

(organic chemistry) Any of a class of polycyclic hydrocarbons, consisting of repeating cyclobutane moieties, that resemble ladders
Aldrichimica Acta Volume 30 No 4 (pdf) from Sigma-Aldrich
This process has been developed into an [n]ladderane synthesis by starting with the dihydro derivative 5 of Smith’s diene and working in tandem.

pterodactyl +? -ane

pterodactylane (plural pterodactylanes)

(organic chemistry) A small, substituted ladderane supposed to have the form of a pterodactyl
Aldrichimica Acta Volume 30 No 4 (pdf) from Sigma-Aldrich
Such systems dwarf the pterodactylane 50 ...

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