New compounds from the Red Sea marine sponge Echinoclathria gibbosa

β-Sitosterol-3-O-(3Z)-pentacosenoate (1), 5α-pregna-3β-acetoxy-12β,16β-diol-20-one (2), and echinoclathriamide ((R)-2′-hydroxy-N-((2S,3S,4R)-1,3,4-trihydroxy-19-methylicosan-2-yl)heptadecanamide) (3) were isolated from the Red Sea sponge Echinoclathria gibbosa.