@book{43,
	author = {Streitwieser, Andrew,  and Heathcock, Clayton H., },
	title = {Introduction to organic chemistry /},
	publisher = {Collier Macmillan, },
	year = {1985},
	address = {London :},
	edition = {3 ed.},
	url = {https://www.cicy.mx/sitios/sib/doctoelectronico/45.pdf}
}