We do not currently know of any antonyms for aplysulphurin.
The noun aplysulphurin is defined as:
The benzopyran derivative (2S,6R,8aS)-6-methyl-7-oxo-5-[(1S)-1,3,3-trimethylcyclohexyl]-2,6,7,8a-tetrahydrofuro[4,3,2-ij]isochromen-2-yl acetate found in a sea slug of the genus Goniobranchus