_:nf7a72a0578f9425997d83b206e511d32xb0
<http://schema.org/dateModified>
"2021-07-06T07:25:57+09:00"^^<http://schema.org/Date>
<https://chemistrystory.com/alkyne/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2021-07-06-7-25-25/>