I am NOT recommending or even suggesting anyone try the below, just highlighting the fact. I personally will be sticking to Modafinil manufactured for human consumption. This is a research chemical.
https://en.wikipedia.org/wiki/Fluorenol
It can be purchased from the following site (one of many) that sells it for about $25 for 2G which by my estimation is about 20 doses.Fluorenol
Eugeroic
A study published by chemists working for the biopharmaceutical company Cephalon to develop a successor to the wakefulness-promoting agent (or eugeroic) modafinil reported that fluorenol was 39% more effective than modafinil at keeping mice awake over a 4-hour period.[citation needed] It is a weak dopamine reuptake inhibitor with an IC50 of 9 μM, notably 59% weaker than modafinil (IC50 = 3.70 μM) despite being a stronger wakefulness-promoting agent, potentially making it even less liable for addiction.[6] It also showed no affinity for cytochrome P450 2C19, unlike modafinil.[7] No human trials have yet been published as of 2014
http://www.ceretropic.com/buy-hydrafinil/