chlorophyll 'a' molecule at its carbon atom third of the pyrrole ring has one of the following: a) aldehyde group b) carboxylic group c)magnesium d) methyl group
![Representative porphyrin structures. (A) pyrrole ring, (B) porphyrin... | Download Scientific Diagram Representative porphyrin structures. (A) pyrrole ring, (B) porphyrin... | Download Scientific Diagram](https://www.researchgate.net/publication/232236953/figure/fig1/AS:216425143771171@1428611183934/Representative-porphyrin-structures-A-pyrrole-ring-B-porphyrin-ring-C.png)
Representative porphyrin structures. (A) pyrrole ring, (B) porphyrin... | Download Scientific Diagram
Photochemical preparation of pyrrole ring-contracted chlorins by the Wolff rearrangement - Organic & Biomolecular Chemistry (RSC Publishing)
![Pyrrole ring opening – pyridine ring closure: Recyclization of 2-(2-oxo-1,2-dihydro-3H-pyrrol-3-ylidene)malononitriles into highly functionalized nicotinonitriles - ScienceDirect Pyrrole ring opening – pyridine ring closure: Recyclization of 2-(2-oxo-1,2-dihydro-3H-pyrrol-3-ylidene)malononitriles into highly functionalized nicotinonitriles - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S0040403919311591-gr1.jpg)
Pyrrole ring opening – pyridine ring closure: Recyclization of 2-(2-oxo-1,2-dihydro-3H-pyrrol-3-ylidene)malononitriles into highly functionalized nicotinonitriles - ScienceDirect
![a Four possible NO2 positions in a pyrrole ring. Three possible NO2... | Download Scientific Diagram a Four possible NO2 positions in a pyrrole ring. Three possible NO2... | Download Scientific Diagram](https://www.researchgate.net/publication/283240192/figure/fig2/AS:960035186286628@1605901633761/a-Four-possible-NO2-positions-in-a-pyrrole-ring-Three-possible-NO2-positions-in-b.gif)
a Four possible NO2 positions in a pyrrole ring. Three possible NO2... | Download Scientific Diagram
![Synthesis of the Ring C Pyrrole of Native Chlorophylls and Bacteriochlorophylls | The Journal of Organic Chemistry Synthesis of the Ring C Pyrrole of Native Chlorophylls and Bacteriochlorophylls | The Journal of Organic Chemistry](https://pubs.acs.org/cms/10.1021/acs.joc.9b01650/asset/images/medium/jo9b01650_0002.gif)
Synthesis of the Ring C Pyrrole of Native Chlorophylls and Bacteriochlorophylls | The Journal of Organic Chemistry
![Synthesis of the Ring C Pyrrole of Native Chlorophylls and Bacteriochlorophylls | The Journal of Organic Chemistry Synthesis of the Ring C Pyrrole of Native Chlorophylls and Bacteriochlorophylls | The Journal of Organic Chemistry](https://pubs.acs.org/cms/10.1021/acs.joc.9b01650/asset/images/large/jo9b01650_0005.jpeg)