The present invention relates to EI-1941 compounds having interleukin-1 production inhibitory activity which are represented by the formula: ##STR1## wherein either of R.sup.1 and R.sup.2 is hydrogen and the other is hydroxy, or R.sup.1 and R.sup.2 together represent oxygen; and R.sup.3 is hydroxy and R.sup.4 is hydrogen, or R.sup.3 and R.sup.4 together represent --0--.