Back in the day, choosing what cannabis to consume was all about three little letters — THC — and the more of it there was, the higher you’d get. Today, picking a product means facing an avalanche of acronyms, each representing a lesser-known chemical compound derived from the cannabis plant and each with its potential health and wellness superpower. Here’s a guide to help cut down on confusion. THC, or delta-9-tetrahydrocannabinol, is the O.G., rock…