a. alternata

(3ξ,4ξ,5ξ,6ξ,7ξ,11ξ)-3,6-Dihydroxy-8-oxo-9-eremophilene-12-oic acid, a phytotoxin recently identified in Alternaria alternata ssp. tenuissima isolates, is associated with fruit spots on apples.

4'-Demethylpodophyllotoxone, an intermediate in the biotransformation pathway of Alternaria alternata S-f6, undergoes further modification with 4-(2,3,5,6-tetramethylpyrazine-1) (4-TMP). This modification yields a novel compound that exhibits potent inhibitory effects on the human gastric cancer cell line BGC-823 [1].

Altertoxin I (Dihydroalterperylenol) is a quinone-type mycotoxin produced by Alternaria alternata fungi. It is mutagenic and cytotoxic and can weakly disrupt metabolic communication.

Methyl 4-hydroxycinnamate is an esterified derivative of p-coumaric acid isolated from the flowers of Trixis michuacana var. longifolia, exhibiting antibacterial and anti-melanogenesis properties.

A mixture of (E)-octadecyl p-coumarate and (Z)-octadecyl p-coumarate has antifungal activity , it shows the dose dependent inhibition of the spore germination of Alternaria alternata and A. porri.