Chemistry — Diels–Alder Reaction
A [4+2] cycloaddition forming a ring.
Rendering…
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digraph DielsAlder {
node [shape=box, style=rounded];
"Diene + dienophile" -> "[4+2] cycloaddition";
"[4+2] cycloaddition" -> "Cyclohexene ring";
"Concerted mechanism" -> "Stereospecific" [style=dashed];
}