![Theoretical Study of the Q and B Bands of Free-Base, Magnesium, and Zinc Porphyrins, and Their Derivatives | The Journal of Physical Chemistry A Theoretical Study of the Q and B Bands of Free-Base, Magnesium, and Zinc Porphyrins, and Their Derivatives | The Journal of Physical Chemistry A](https://pubs.acs.org/cms/10.1021/jp984807d/asset/images/medium/jp984807df00001.gif)
Theoretical Study of the Q and B Bands of Free-Base, Magnesium, and Zinc Porphyrins, and Their Derivatives | The Journal of Physical Chemistry A
![Change Grow Live - Birmingham on Twitter: "MDMA tabs with 'Versace' logo & high in purity are circulating in Bham #CrushDabWait https://t.co/XbBbqezBp8" / Twitter Change Grow Live - Birmingham on Twitter: "MDMA tabs with 'Versace' logo & high in purity are circulating in Bham #CrushDabWait https://t.co/XbBbqezBp8" / Twitter](https://pbs.twimg.com/media/CX8g0SCWsAAt1Qf.png)
Change Grow Live - Birmingham on Twitter: "MDMA tabs with 'Versace' logo & high in purity are circulating in Bham #CrushDabWait https://t.co/XbBbqezBp8" / Twitter
![Bioanalytical methods for determining ecstasy components in biological matrices: A review - ScienceDirect Bioanalytical methods for determining ecstasy components in biological matrices: A review - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S0165993618302917-gr3.jpg)