Also known as 1-methylallene, methylallene, 1,2-butadiene
1,2-Butadiene is the organic compound with the formula CH2=C=CHCH3. It is an isomer of 1,3-butadiene, which is a common monomer used to make synthetic rubber, and is often co-produced with it. It is a colorless flammable gas, one of the simplest substituted allenes.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).