Assertion: ecstasy's mdma | /r/HasProperty | patented by merck pharmaceuticals
Facets:
value: on december
type: TEMPORAL
Source sentences:
text: MDMA was first synthesized in the 1890s and later patented by Merck pharmaceuticals on December 24, 1912, but it wasn't until the mid 1970s that articles related to its psychoactivity began showing up in scholarly journals.