| 英文名称: | | 4-isopropylidene-3,3-dimethyl-2-oxetanon | | 3,3-dimethyl-4-(1-methylethylidene)-2-oxetanon | | 3-hydroxy-2,2,4-trimethyl-3-pentenoic acid, beta-lactone | | 3-hydroxy-2,2,4-trimethyl-3-pentenoic aci beta-lactone | | 4-isopropylidene-3,3-dimethyl-2-oxetanone | | dimethylketene dimer | | 2,2-dimethyl-3-isopropyliden-beta-propiolactone |
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