Sulfurea looks to be a commercial fertiliser but it is also referred to in the (genericized) form of Sulfurea or sulfúrea.

"Sulfurea is an acidic nitrogenous fertilizer which serves as urea thiosulfate and supplies nitrogen andsulfur to plant. It contains 10%S and 9.2%N. Its pH ranges from 3-4. Due to acidic pH, it supplies nutrients presentin soil to the plants. In sulfurea nitrogen and sulfur are dissolved in solution of fulvic acid. So, sulfur and fulvicacid solution prevents volatilization of nitrogen (Pamphlet on sulfurea by life technologies private limited)."
https://webcache.googleusercontent.com/search?q=cache:W8HLiv...

"First adaptation is based on a new enhanced efficacy nitrogen fertilizer “Sulfurea”, developed by Life Technologies which is not subjected to losses due to phenomena of global warming."
https://www.researchgate.net/publication/260694289_Significa...

"3.5 Sulfúrea como fuente de nitrógeno
La Sulfúrea es un fertilizante que suministra a los cultivos nitrógeno en un (40 %) y Azufre, éste último vital para nuestros suelos y promotor de una mejor asimilación del nitrógeno, contribuyendo a la obtención de una mejor cosecha. Brinda a los diferentes cultivos una nutrición oportuna y balanceada con nitrógeno, calcio y magnesio para obtener el máximo rendimiento en los cultivos donde se utilice (FERTICA, 2016)."
https://repositorio.una.edu.ni/3508/1/tnf04c352e.pdf