Reaction catalyzed by ceramidase (3.5.1.23)

		+		H2O	=			+
	4-nitrobenzo-2-oxa-1,3-diazoyl-N-dodecanoylsphingosine	+		H2O	=		4-nitrobenzo-2-oxa-1,3-diazoyl-dodecanoic acid	+		sphingosine